4MA1/1F Jan 2023, Question 11: Drawing Straight-Line Graphs
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1F (Foundation) · Calculator · 3 marks
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The question, in short
On the given grid, plot the straight-line graph of y = 1 − 2x for x values between −2 and 3.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 3 marks
- 1x = −2: y = 1 − 2(−2) = 1 + 4 = 5
- 2x = −1: y = 1 − 2(−1) = 1 + 2 = 3
- 3x = 0: y = 1 − 2(0) = 1
- 4x = 1: y = 1 − 2(1) = 1 − 2 = −1
- 5x = 2: y = 1 − 2(2) = 1 − 4 = −3
- 6x = 3: y = 1 − 2(3) = 1 − 6 = −5
- 7Plot points (−2, 5), (−1, 3), (0, 1), (1, −1), (2, −3), (3, −5)
- 8Draw straight line through points from x = −2 to x = 3
AnswerA straight line through (−2, 5), (−1, 3), (0, 1), (1, −1), (2, −3), (3, −5)
Stuck on a step? Read the free lesson: Drawing Straight-Line Graphs
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