Higher June 2019 Paper 2 Q8

8 On the axes, sketch the curve \(\quad y = x^3 - 2\)

You must show the coordinates of the \(y\)-intercept. [2 marks]

A partially correct curve must start in the 3rd quadrant and finish in the 1st quadrant, passing through the 4th quadrant not include a section with negative gradient
A fully correct curve must have all the properties of a partially correct curve have only a decreasing gradient to the left of the \(y\)-axis have only an increasing gradient to the right of the \(y\)-axis Condone a positive gradient at the \(y\)-intercept Condone straight line segments at each end of the curve
Fully correct curve with \(y\)-intercept labelled \(-2\)	B2
Partially correct curve with \(y\)-intercept labelled \(-2\)	B1
\(y\)-intercept labelled \((-2, 0)\) is incorrect and can score a maximum of B1
Ignore any numbers on the axes other than the \(y\)-intercept
\(y\)-intercept \((0, -2)\) stated does indicate the point \((0, -2)\)
Unlabelled notches do not indicate the point \((0, -2)\)
A table of values does not indicate the point \((0, -2)\)
Graph consisting only of straight lines	B0
A fully correct curve but point \((0, -2)\) is not indicated	B1
Partially correct curve with point \((0, -2)\) indicated	B1
Fully correct curve with point \((0, -2)\) indicated	B2
Partially correct curve with point \((0, -2)\) indicated	B1
Curve includes a negative gradient so not partially correct	B0