# How do you solve #2x+22=0# by graphing?

##### 1 Answer

Plot the graph of

The solution is the value of

#### Explanation:

It is very easy to solve this by using algebra, but if you need to solve it by graphing then:

Plot the graph of

The solution is the value of

You can do this with a graphic calculator or computer, or you can do it on paper as follows:

Put values for

(

and plot them as the

e.g.

if

if

if

Draw a straight line through these points:

graph{2x+22 [-41.3, 38.7, -5.58, 34.42]}

The line shows all the values of

We are interested in the value of

Looks like it's

(We can check this by using

The plot of

graph{-1000x-11000 [-41.3, 38.7, -5.58, 34.42]}