If fb) = 2x – 1. find f(2)​

Plug in 2 for x
2(2) - 1 = 4 - 1 = 3
f(2) = 3

You can find the area of a rectangle by multiplying the length and height. so multiply 1/2*7/4(which is the simpler version of 1 3/4) and you get 7/8 as your answer.