4MA1/2F Jan 2019, Question 24: The Equation y = mx + c
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2F (Foundation) · Calculator · 3 marks
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The question, in short
A straight line L is shown on a grid with x from −4 to 4 and y from −4 to 6. Find an equation for L.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 3 marks
- 1L passes through (0, 1) and (2, 4)
- 2Gradient = (4 − 1) ÷ (2 − 0) = 3/2 = 1.5
- 3y-intercept is 1, so y = 1.5x + 1
Answery = 1.5x + 1
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