Which equation represents the line with gradient 3 that cuts the y-axis at -2?
Answer and explanation
Correct answer: D. y = 3x - 2, from y = mx + c with m = 3 and c = -2, the y-intercept
- Step 1: In y = mx + c, m is the gradient and c is the y-intercept. Step 2. Substitute m = 3 and c = -2. Answer: y = 3x - 2. Why not the others: y = -2x + 3 swaps m and c; y = 3x + 2 has intercept +2; y = -2x - 3 changes both values.
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