50 - Constant
Height =
Width
Height
25
(4, 25)
(5, 20)
(10,10)
(20,5)
60
26
Width

VUX = vertical line, undefined slope, represented by x = a number.
so look at ur points (3,-5)and a vertical line is represented by x = a number...so in ur points, the x value is 3, therefore, ur equation is :
x = 3x will always be 3 no matter what y is.