Try to answer the following questions here:

• What is this question used for?
• What does this question assess?
• What does the student have to do?
• How is the question randomised?
• Are there any implementation details that editors should be aware of?

### History

#### Checkpoint description

Describe what's changed since the last checkpoint.

#### Johnny Yi1 year, 7 months ago

Created this as a copy of Harry's copy of David's copy of Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$.
Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ Ready to use Hannah Aldous 20/11/2019 14:45
Inbbavathie's copy of Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ draft Inbbavathie Ravi 24/07/2017 03:49
Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ draft Adrian Jannetta 24/08/2017 14:39
Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ Ready to use Ida Landgärds 09/05/2018 06:55
spørsmål 2 draft Ida Landgärds 20/06/2018 07:46
Logarithms [L6] draft Abbi Mullins 24/07/2018 14:52
David's copy of Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ draft David Martin 30/07/2018 14:34
Algebra: Log to Index Form Doesn't work Clare Lundon 31/10/2019 14:11
Algebra: Index to Log Form draft Clare Lundon 26/10/2018 14:08
Harry's copy of David's copy of Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ draft Harry Flynn 15/11/2018 10:33
Basic Algebra : Log draft Johnny Yi 23/01/2019 05:00
Maria's copy of Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ draft Maria Aneiros 29/05/2019 06:58
Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ draft Xiaodan Leng 11/07/2019 00:16
Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ draft Xiaodan Leng 11/07/2019 01:47
Katy's copy of Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ Ready to use Katy Dobson 20/09/2019 15:12
Paul's copy of Inbbavathie's copy of Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ draft Paul Verheyen 17/04/2020 12:54
W2b - Logarithms basics Ready to use Timur Zaripov 10/10/2019 12:15
Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ draft Marie Nicholson 08/10/2019 16:00
Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ draft Marie Nicholson 08/10/2019 12:41
claire's copy of Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ draft claire lines 27/04/2020 13:50
claire's copy of Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ draft claire lines 27/04/2020 14:50
Ahmed's copy of Using the Logarithm Equivalence $\log_ba=c \Longleftrightarrow a=b^c$ draft Ahmed Al-Razaz 19/05/2020 00:34
ALG Equivalencia log = exp $\log_ba=c \Longleftrightarrow a=b^c$ draft David Vanegas 05/06/2020 02:25

Give any introductory information the student needs.

No variables have been defined in this question.

(a number)

Numbers between and (inclusive) with step size
A random number between and (inclusive) with step size

(text string)

(numbers)

(text strings)

This variable is an HTML node. HTML nodes can not be relied upon to work correctly when resuming a session - for example, attached event callbacks will be lost, and mathematical notation will likely also break.

If this causes problems, try to create HTML nodes where you use them in content areas, instead of storing them in variables.

Describe what this variable represents, and list any assumptions made about its value.

This variable doesn't seem to be used anywhere.

Name Type Generated Value

#### Error in variable testing condition

There's an error in the condition you specified in the Variable testing tab. Variable values can't be generated until it's fixed.

Error:

for seconds

Running for ...

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### Penalties

Name Limit

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Select a part to edit.

The correct answer is an equation. Use the accuracy tab to generate variable values satisfying this equation so it can be marked accurately.

#### Checking accuracy

Define the range of points over which the student's answer will be compared with the correct answer, and the method used to compare them.

#### Variable value generators

Give expressions which produce values for each of the variables in the expected answer. Leave blank to pick a random value from the range defined above, following the inferred type of the variable.

#### String restrictions

Both choices and answers must be defined for this part.

Help with this part type

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Check that the marking algorithm works with different sets of variables and student answers using the interface below.

Create unit tests to save expected results and to document how the algorithm should work.

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#### Unit tests

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The following tests check that the question is behaving as desired.

### This test has not been run yet This test produces the expected output This test does not produce the expected output

This test is not currently producing the expected result. Fix the marking algorithm to produce the expected results detailed below or, if this test is out of date, update the test to accept the current values.

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Name Value

 This note produces the expected output

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When you need to change the way this part works beyond the available options, you can write JavaScript code to be executed at the times described below.

Run this script the built-in script.

This script runs after the built-in script.

To account for errors made by the student in earlier calculations, replace question variables with answers to earlier parts.

In order to create a variable replacement, you must define at least one variable and one other part.

The variable replacements you've chosen will cause the following variables to be regenerated each time the student submits an answer to this part:

These variables have some random elements, which means they're not guaranteed to have the same value each time the student submits an answer. You should define new variables to store the random elements, so that they remain the same each time this part is marked.

This part can't be reached by the student.

Add a "next part" reference to this part from another part.

None of the parts which can lead to this part are reachable either.

### Next part options

Define the list of parts that the student can visit after this one.

• #### Variable replacements

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Variable Value

### Previous parts

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### Parts

#### Steps

Give a worked solution to the whole question.