Question

Determine x so that the three points (x,-3),(9,1), and (13,2) will lie on a straight line.

Answer 1

Step-by-step explanation:

Let:

First, we use the slope formula:

Next, we find the slope from point 1 to point 2. So,

Then, we solve for x using the slope and points 2 and 3.

We can double check it by using all points:

Therefore, the answer is x = -7.