A crew painted a house and finished 3/4 of the entire paint job in 6 days?
What is the rate of paint job completion per day?
we know that
To find out the unit rate , divided the total paint job by the number of days
so
Solution:
we are given that

we have been asked to find f(x).
we can find the value of f(x) by re-writing the given function in the form of f(x+3) and thereafter we will replace (x+3) by x.
we can re-write the given function as below

Hence the expression representing f(x) is f(x)=4x+3.
It's C.
multiply by 3
x = 4, y = 4x3 = 12
x = 5, y = 5x3 =15
x = 6, y = 6x3 =18