Question

Kellie is working on a graphic on a computer screen. She zooms in to enlarge parts of the graphic. Each time she zooms in, she increases the size by
25
%
.



Which constraint represents the percent of the original size,
y
, in decimal form when zooming in
x
times?



A.
y
=
1.75
x

B.
y
=
1.25
x

C.
y
=
0.75
x

D.
y
=
0.25
x

Answer 1

Each zoom multiplies the size by 1 + 0.25 = 1.25. After x zooms the size is (1.25)^x of the original, so y = 1.25^x — choice B.