Question

Write an equation for a line perpendicular to f(x)=5x−1 and passing through the point (5,20)

Answer 1

y - 20 = (-1/5)(x - 5)

Explanation:

The slope of the given line is 5. The slope of any line perpendicular to the given line is the negative reciprocal of the given slope:

Slope of perpendicular line here is -1/5.

We use the point-slope formula as a framework here:

y - 20 = (-1/5)(x - 5)