Answer:
x+9
Step-by-step explanation:
f(x) = x, going up 9
that is y=x, going up 9
if you wnat to go up, subtract 9 from y
y -9 = x
y=x+9
convert back to f(x)
f(x) = x+9
2
f=1
2 x 1=2
4-2=2
19% turns into 20%
20%*41=8.2
Have a nice day.
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