Problem
QUESTION 2 Find the slope of the line going through the pair of points. \[ (2,-9),(2,-1) \]
Solution
Step 1 ：Step 1: Use the slope formula, m = \(\frac{y2-y1}{x2-x1}\).
Step 2 ：Step 2: Substitute the coordinates, m = \(\frac{(-1)-(-9)}{2-2}\).
Step 3 ：Step 3: Simplify the expression, the slope is undefined.
