Graphs 7
1 mark · EasyWrite down the number of intersection points of the graphs of the equations y = x^2 and y = x + 2.
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2
Also accept: two; 2
Common mistakes: 1; 3
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Marking points
B1 · 1 mark · Correctly states there are 2 points of intersection.
Worked solution
A quadratic and a straight line can intersect in at most two points. For y = x^2 and y = x + 2, setting x^2 = x + 2 gives a quadratic equation with two solutions, so there are 2 intersection points.