I need help ASAP this is on khan academy please help

Which equation represents the partial sum of the geometric series?

Pentagon abcde is dilated according to the rule do,3(x,y) to create the image pentagon a'b'c'd'e', which is shown on the graph. what are the coordinates of point a of the pre-image? a) (-1, 1)b) (-1, 2)c) (-9, 6)d) (-9, 18)

1/4x+5=3/4. i can't get access to the answer to this question! and, my request on "contact us" will not go