The equation of line $r$ is $y-9=4(x-4)$. Perpendicular to line $r$ is line $s$, which passes through the point $(6,-5)$. What is the equation of line $s$?
Write the equation in slope-intercept form. Write the numbers in the equation as simplified proper fractions, improper fractions, or integers.
Write the equation in slope-intercept form. Write the numbers in the equation as simplified proper fractions, improper fractions, or integers.