How do you graph a linear equation?
for example, -18x+9y=72

The graph of given equation is shown below.

Step-by-step explanation:

We need to draw the graph of linear equation.

Let as consider a linear equation.

First we need to find any two points on the line. So, will find x and y-intercept of the line.

Substitute x=0 in the given equation to find the y-intercept.

Divide both sides by 9.

⇒ y-intercept of the line is 8.

Substitute y=0 in the given equation to find the x-intercept.

Divide both sides by -18.

⇒ x-intercept of the line is -4.

Now, plot these two points (0,8) and (-4,0) on a coordinate plane and connect them by a straight line.

Therefore, the graph of given equation is shown below.

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)