The points​ A(0,5), B(4,2), and​ C(0,2) form the vertices of a right triangle in the coordinate plane. What is the equation of the line that forms the​ hypotenuse?

find the slope by using the equation m=y2-y1/x2-x1 and sub in the two points A and B (0,5) (4,2)
2-5/4-0
-3/4=m
Sub what you know into the equation y=mx+b
y=-3/4x+5
We know that b=5 because that is the y-intercept present on the line.
Hope this helps