Question

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

Answer 1

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