Question

Find the equation of a line perpendicular to 4x - 5y = -1 that contains the point (5, -4)

Answer 1

y = -5/4x + 2 1/4

Explanation:

you would start by changing the equation to point intercept form

4x + 1 = 5y

4/5y + 1/5 = y

then you fill in the points and change the slope to -5/4 (reciprocal and opposite sign)

-4 = -5/4(5) + b

-4 = -6.25 + b

2.25 = b