Question

Find the slope of the line that passes through each pair of points. (-18, 20) and (-18, -15)

Answer 1

In order to calculate the slope between two points (x1, y1) and (x2, y2), we can use the formula:

$m=\frac{y_2-y_1}{x_2-x_1}$

Using the points (-18, 20) and (-18, -15), we have:

$m=\frac{-15-20}{-18-(-18)}=-\frac{35}{0}=\infty$

The slope of this line is infinite, that is, it is a vertical line.