How do you graph by plotting points for f(x)=5x-8?

1 Answer
Jul 31, 2015

Generate values of f(x)f(x) for a few values of xx,
then plot your points (x,f(x))(x,f(x)) and connect with a line.

Explanation:

Since the equation is linear only 2 points are needed, but several will help ensure accuracy.

x=0 rarr f(x) = -8x=0f(x)=8color(white)("XXXX")XXXXrArr (0,-8)(0,8) is a point on the line
x=1 rarr f(x) = -3x=1f(x)=3color(white)("XXXX")XXXXrArr (1,-3)(1,3) is a point on the line
x=2 rarr f(x) = 2x=2f(x)=2color(white)("XXXX")XXXXrArr (2,2)(2,2) is a point on the line
x=3 rarr f(x) = 7x=3f(x)=7color(white)("XXXX")XXXXrArr (3,7)(3,7) is a point on the line
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