Graphs 6

3 marks · Normal

The graph of crosses the y-axis at a certain point.

Find the coordinate where the graph crosses the y-axis. Explain your method.

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.

Show answer

(0, 0)

Must show: Sets x = 0, Finds y value, States coordinate

Also accept: (0, 0) with full method

Common mistakes: Substituting y = 0 instead; Arithmetic errors

Show mark scheme and worked solution

Marking points

M1 · 1 mark · Sets x = 0 to find y-intercept.

M2 · 1 mark · Calculates y: y = (0)^3 - 5*0 = 0.

A1 · 1 mark · States the y-intercept coordinate as (0, 0).

Worked solution

To find where the graph crosses the y-axis, set x = 0:

The coordinate is (0, 0).