Graphs 4

4 marks · Normal

A straight line has equation .

(a)

Write down the gradient of this line.

[1 mark]

(b)

Find the y-intercept.

[1 mark]

(c)

Find the value of x when y = 0.

[2 marks]

Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.

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(a) 5

(b) -8

Common mistakes: Mixing up gradient and intercept; Arithmetic errors

Show mark scheme and worked solution

Marking points

B1 (a) · 1 mark · Gradient identified as 5.

B2 (b) · 1 mark · Y-intercept identified as -8.

M1 (c) · 1 mark · Sets y = 0, rearranges to 0 = 5x - 8 and solves for x.

A1 (c) · 1 mark · Correct value: x = 1.6

Worked solution

(a) The gradient is 5.

(b) The y-intercept is -8.