Write and expression for F

f(0)=4 and f(x)-f(x+2)=-3

^^Those are the hints given. What is the function? How did you solve it?

some points are from f(x+2) = f(x) + 3 are (0,4) , (2,7) , ( 4 , 10 ) , ( 6 , 13 )


and note [ f(x+2) -f(x) ] / 2 = 3 / 2......3x / 2 + 4 ??