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

1 Answer
Alan P.
Jul 31, 2015

Generate values of #f(x)# for a few values of #x#,
then plot your points #(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) = -8##color(white)("XXXX")##rArr (0,-8)# is a point on the line
#x=1 rarr f(x) = -3##color(white)("XXXX")##rArr (1,-3)# is a point on the line
#x=2 rarr f(x) = 2##color(white)("XXXX")##rArr (2,2)# is a point on the line
#x=3 rarr f(x) = 7##color(white)("XXXX")##rArr (3,7)# is a point on the line
enter image source here

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