the answer is A
if you multiply x by 3 then add 2 you get f(x)
A.
Juan Increase 25/350 = .071 * 100 = 7 %
Rhia Increase 75/275 = .273 * 100 = 27 %
Max Decrease 40/400 = .1 * 100 = 10 %
b.
Juan sold more than $355 but his increase was less than 10% so he did not get a bonus.
Rhia had an increase more than 10% but she did not sell more than $355 so she did not get a bonus.
Max had a decrease so he did not get a bonus.
Multiplication is associative, therefore, (3 x 4) x 7 = 3 x (4 x 7).
(3x+2)(3x-2)
Hope that helps