Question detail
Use a checking method for this problem: final-answer check: find the gradient of the line through (22, 23) and (24, 27). State the final answer and verify it against the information in the question.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Notation, vocabulary and manipulation
Question
Use a checking method for this problem: final-answer check: find the gradient of the line through (22, 23) and (24, 27). State the final answer and verify it against the information in the question.
Answer
A valid checked answer is 2. The method is: Gradient means change in y divided by change in x. The change in y is 4. The change in x is 2. Divide the change in y by the change in x. 2 The final line agrees with the canonical answer.
Explanation
calculator check keeps the canonical answer 2 fixed before the model answer is written, so the worked solution and final answer agree.
Common mistake
Manipulating expressions common mistake 1
Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Expand products of two binomials and factorise quadratics of the form x^2 + bx + c where appropriate..
Show the method first, then give the final answer in the required form. Apply this directly to Manipulating expressions.
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