Line ab contains points a (-1,3) amd b (5,3). line ab has a slope

Hello!

To calculate the slope given two points, we use the formula y2-y1/x2-x1. You can switch the ones and twos and the slope will be the same. We will have (-1,3) represent (x1,y1) and (5,3) represent (x2,y2).

Now we plug these numbers into the equation.

3-3/5+1
0/6
Undefined

Since the number is divided by zero, the slope is undefined, or the line is vertical. Just to check, we will switch the ones and twos.

3-3/-6
0/-6
Undefined

Our line is vertical, therefore our slope is undefined.

I hope this helps!