Use the graph (a quadratic graph and a straight line) to answer: which of the following gives the points of intersection of the linear graph and the quadratic graph?
The vertical scale is half the horizontal scale.
Worked solution (try it first)
The points of intersection are where the line meets the curve.
The graph shows two.
The first is on the x-axis at x=−1: the point (−1,0).
The dashed lines mark the second: x=3 and y=7, the point (3,7).