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Try to answer the following questions here:

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Checkpoint description

Describe what's changed since the last checkpoint.

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Christian Lawson-Perfect 2 years, 1 month ago

Saved a checkpoint:

I've changed the definition of x2 to make sure the sales are always non-negative.

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J. Richard Snape 2 years, 1 month ago

Part (b) uses the random variable n={0..4}, but that can give negative sales in a year which doesn't make much sense.  I think that the variable definition has been copied over from a different word type question and should actually be allowed to run {2..5}

Elliott Fletcher 2 years, 4 months ago

Published this.
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Christian Lawson-Perfect 2 years, 4 months ago

Gave some feedback: Ready to use

Picture of Christian Lawson-Perfect

Christian Lawson-Perfect 2 years, 4 months ago

Saved a checkpoint:

Part c was wrong in a few ways! Given the formula for converting from Celsius into Fahrenheit, it asked the student to convert a temperature in Celsius into Fahrenheit - the other way round. It looks like your definition of the variable T_F was also wrong.

I've fixed those, and the rest of the question looks good.

Restore this checkpoint

Aiden McCall 2 years, 4 months ago

Gave some feedback: Needs to be tested

Aiden McCall 2 years, 4 months ago

Gave some feedback: Has some problems

Aiden McCall 2 years, 5 months ago

Gave some feedback: Needs to be tested

Lauren Richards 2 years, 5 months ago

Gave some feedback: Has some problems

Lauren Richards 2 years, 5 months ago

  • Main parts
  • You need a full stop at the end of the statement.
  • You don't need a comma before the function of the curve in part a).
  • I think part a) needs to be reworded a little. Maybe put the curve function first. 
  • Part b) is fine.
  • You don't need a comma on the first line of part c). However, there should be one after the formula. There shouldn't be one after where on the third line.
  • Advice
  • It should be a full stop rather than a comma after "substitute 5 into 9x^2 +3x +22." in part a). Maybe reiterate that the final answer you get is equal to the y-coordinate.
  • Same comments as above for part b). A full stop and reiterate that it is the predicted number of yachts sold.
  • For part c), it should be a full stop at the end of the first line. Start the next line as a new sentence with a capital letter and end that line with a full stop. Reiterate that the final answer is the temperature in fahrenheit. 
  • Good questions and I like the contexts!

Aiden McCall 2 years, 5 months ago

Gave some feedback: Needs to be tested

Aiden McCall 2 years, 5 months ago

Gave some feedback: Has some problems

Aiden McCall 2 years, 5 months ago

Gave some feedback: Needs to be tested

Lauren Richards 2 years, 5 months ago

Gave some feedback: Has some problems

Lauren Richards 2 years, 5 months ago

Hi Aiden,

- I think the way that you have written x=5 in the advice is the way you should write it in the questions. I think that would make it a little clearer. At first, it looks like x=5 is a continuation of the expression. I think this is probably better:

'At x=5,

what is the value of 4x^2+x+53?'

- You need to say in part c) that the user is to use pi=3.142. You did it for part e) but not for part c). I did the question using my calculator pi button as you hadn't specified using any simplification, and the answer I gave was marked incorrect due to different rounding. I then had to use the same answer when finding the volume of the cone and it accepted my answer that time, when multiplied with h/3 so it is only a problem for part c).

- You have the radius, 'r' written in LaTex in part c), but not in part d).

- In part e), "Geraldine has a ball of radius 31.4cm // she wants to find the volume of the ball." doesn't make sense. You're missing a full stop and a capitalisation, or an and. Also, I think the next sentence should be on a separate line personally.

- I don't know if it is automatic, or whether you can change it, but your rounding requirements in part c) and d) are specifying 1 decimal place - singular, but saying "Round your answer to 1 decimal places" - plural.

Aiden McCall 2 years, 5 months ago

Gave some feedback: Needs to be tested

Aiden McCall 2 years, 5 months ago

Gave some feedback: Has some problems

Aiden McCall 2 years, 5 months ago

Gave some feedback: Needs to be tested

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Chris Graham 2 years, 5 months ago

Gave some feedback: Has some problems

Picture of Chris Graham

Chris Graham 2 years, 5 months ago

In the equations for volume, the word volume itself should be in roman. 

The first part of the prompt to part (e) doesn't make sense, and the second part needs a comma after "Using the below equation".

Some additional punctuation of equations is required in the advice. And where you have in small, italic, "Rounding your answer to 1 decimal place", there is no need for this to be either small or italic in the advice. Grammatically, you've also gone from first person (plural) to second person.

Aiden McCall 2 years, 5 months ago

Gave some feedback: Needs to be tested

Aiden McCall 2 years, 5 months ago

Gave some feedback: Has some problems

Aiden McCall 2 years, 5 months ago

Gave some feedback: Needs to be tested

Aiden McCall 2 years, 5 months ago

Gave some feedback: Has some problems

Aiden McCall 2 years, 5 months ago

Gave some feedback: Needs to be tested

Aiden McCall 2 years, 5 months ago

Created this as a copy of Substitution without Geometry.
Name Status Author Last Modified
Substitution without Geometry draft Aiden McCall 15/06/2017 11:56
Substitute values into formulas Ready to use Aiden McCall 17/10/2017 12:18
Aiden's copy of Substitution without Geometry draft Aiden McCall 21/06/2017 10:44
Marte's copy of Substitute values into formulas draft Marte Bråtalien 12/04/2018 11:00
Ida's copy of Substitute values into formulas draft Ida Landgärds 13/04/2018 09:16
Maria's copy of Substitute values into formulas draft Maria Aneiros 30/05/2019 03:12

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