Question

Work out the equation of the line which has a gradient of -2 and

passes through the point (1, 7)

Answer 1

y = -2x + 9

Explanation:

1) Use the equation y = mx + c (m being gradient and c being y-intercept)

2) Substitute all the values to get 7 = -2(1) + c

3) Solve to get c:

• 7 = -2 + c
• 9 = c

4) Final answer: y = -2x + 9