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Maths Exercices
Graph a proportional relationship

The graph of a proportional relationship is a straight line through the origin.

Graph the function y=2x

You can graph a function by plotting ordered pairs.

Find ordered pairs by plugging in values for x.

Plug in x = 0.

y = 2x

y = 2(0)

y = 0

The point (0, 0) is on the graph.

Plug in x = 1.

y = 2x

y = 2(1)

y = 2

The point (1, 2) is on the graph.


Plot the points (0, 0) and (1, 2) on the graph.





The graph of the equation y = 2x is the straight line connecting the points (0, 0) and (1,2)