How do you graph y=3x-2 by plotting points?

1 Answer
Donatello N.
Jun 22, 2016

Plug in a value of x in to the equation. The resulting value is its pair. Have two or three pairs. Plot these points in a Cartesian plane. Connect the points.

Explanation:

Choose any value of x. But, to make it simpler, lets use the values: 0, 1, and 2.

With 0,
y = 3*0 -2 = 0 -2
y = -2
hence, we have the pair: (0,-2)

With 1,
y = 3*1 -2 = 3-2
y = 1
hence, we have the pair: (1,1)

With 2,
y = 3*2 -2 = 6-2
y = 4
hence, we have the pair: (2,4)

then we plot these points and connect them and have this:
graph{3x-2 [-5, 5, -2.5, 2.5]}

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