Question

Find the slope of the line that contains the points (-2, 1) and (-2,-9)

Answer 1

Slope of the line if two points are known

Explanation:

Formula is y2-y1/x2-x1

so that 1-(-9)/-2-(-2)

10/0 is undefined that means line is parallel to y-axis

when a line is parallel to y axis it has no slope.