Question

What is the slope of the line that passes through the points (9, 4) and (9,- 5)?

Answer 1

• (9,4)
• (9,-5)

$\\ \sf\longmapsto m=\dfrac{y_2-y_1}{x_2-x_1}$

$\\ \sf\longmapsto m=\dfrac{-5-4}{9-9}$

$\\ \sf\longmapsto m=\dfrac{-9}{0}$

$\\ \sf\longmapsto m=\infty$

Answer 2

Answer:

• Undefined

Step-by-step explanation:

The given two points have same x- coordinates, hence the line vertical and is parallel to the y-axis:

• x = 9

Its slope is undefined.