Question

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

Answer 1

See a solution process below:

Explanation:

First, solve for two points which solve the equation and plot these points:

First Point: For `x = 0`

`f(x) = (5 * 0) - 8`

`f(x) = 0 - 8`

`f(x) = -8` or `(0, -8)`

First Point: For `x = 2`

`f(x) = (5 * 2) - 8`

`f(x) = 10 - 8`

`f(x) = 2` or `(2, 2)`

We can next plot the two points on the coordinate plane:

graph{(x^2+(y+8)^2-0.15)((x-2)^2+(y-2)^2-0.15)=0 [-26, 26, -13, 13]}

Now, we can draw a straight line through the two points to graph the line:

graph{(y - 5x + 8)(x^2+(y+8)^2-0.15)((x-2)^2+(y-2)^2-0.15)=0 [-26, 26, -13, 13]}