Which equation produces a line that is perpendicular to the line represented by the function below?
y = 2/5x + 9
A. 5x + 2y = 4
B. 2x - 5y = 8
C. 5x - 2y = -3
D. 2x + 5y = -7
so the new line has slope -5/2
You should memorize that the slope of
Ax + By = C is -A/B
I see only one equation where -A/B = -5/2