Plotting graphs

y = 2x +4 When x = 0 y = 0 + 4 = 4 When y = 0 2x + 4 = 0 2x = - 4 X = - 2

Linear graphs(x = 0, y = 0, method)

+y

-y

+x-x 0

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Linear graphs(x = 0, y = 0, method) simultaneous equations x – y = 2 and 2x – y = 6

x – y = 2(y=0, x = 2) ( x = 0 y = -2)

X – y = 0

2x – y = 6(y =0, x = 3) ( x =0, y = -6)

2x – y = 6

X = 4, y = 2

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Quadratics

y = x2

x -2 -1 0 1 2

x2 4 1 0 1 4

y 4 1 0 1 4