anonymous one year ago What is the slope of the line that contains the points (5, -9) and (5,9)? A. 0 B. 5/9 C. -9/5 D undefined

use the slope formula $\huge\rm \frac{ y_2-y_1 }{ x_2 -x_1 }$replace x's and y's with the order pair (x_1 ,y_1)(x_2 ,y_2)