What is the equation of the following line written in slope-intercept form?

points are (1,5) and (-1,-5)

possible answers are
y= 5x
y= -5x
y= 5/x

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

Which set of reflections would carry trapezoid abcd onto itself? a) x-axis, y=x, y-axis, x-axis b) x-axis, y-axis, x-axis c) y=x, x-axis, x-axis d) y-axis, x-axis, y-axis, x-axis

Can somebody 1. what is the formula for finding the vertical distance between two points on a coordinate plane?