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?

Tom's workspace

### History

#### Checkpoint description

Describe what's changed since the last checkpoint.

#### Tom Bold11 months, 1 week ago

Created this as a copy of Straight lines: given the graph find the equation.
Straight lines: one point gradient Ready to use Ben Brawn 02/06/2016 06:49
Straight lines: given the graph find the equation Ready to use Ben Brawn 13/06/2019 09:53
Katherine's copy of Straight lines: one point gradient draft Katherine Tomlinson 01/08/2017 13:04
Straight lines: given the graph find the equation draft Mark Hodds 23/02/2018 14:11
Terry's copy of Straight lines: given the graph find the equation draft Terry Young 03/04/2019 17:41
Terry's copy of Straight lines: one point gradient draft Terry Young 03/04/2019 17:48
Point Gradient Form draft Johnny Yi 30/04/2019 01:50
Simon's copy of Terry's copy of Straight lines: given the graph find the equation draft Simon Thomas 20/05/2019 12:28
Simon's copy of Terry's copy of Straight lines: one point gradient draft Simon Thomas 20/05/2019 12:12
Tom's copy of Straight lines: given the graph find the equation draft Tom Bold 18/06/2019 13:06
Straight lines: given the graph find the equation draft Xiaodan Leng 10/07/2019 21:36
NCM4 U1L1 Terry's copy of Straight lines: given the graph find the equation Ready to use Terry Young 23/01/2020 22:18

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 ...

No parts have been defined in this question.

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

##### Base marking algorithm

#### Test that the marking algorithm works

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.

There's an error which means the marking algorithm can't run:

Name Value

Note
Value Feedback

Click on a note's name to show or hide it. Only shown notes will be included when you create a unit test.

#### Unit tests

No unit tests have been defined. Enter an answer above, select one or more notes, and click the "Create a unit test" button.

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.

One or more notes in this test are no longer defined. If these notes are no longer needed, you should delete this test.

Name Value

 This note produces the expected output

This test has not yet been run.

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.

### Parts

Give a worked solution to the whole question.

### Preamble

This script will run after the question's variable have been generated but before the HTML is attached.
Apply styling rules to the question's content.
This question is not used in any exams.