1) Evaluate the function f(x)=-3x+7
a) Find f(2)
b) Find f(-2)
2) Let g(x)= -x^2+6x+3. Find and simplify g(-4)
G(-4)= (simplify answer)
3) Let f(x)= -4x+5. Find f(1/2)
f(1/2)= (simplify your answer)
1a) Finding f(2) means that you have to substitute 2 for the variable x. So,
when you substitute, the equation becomes f(2)=-3(2)+7. Then just do the math:
f(2)=-6+7, and then: f(2)=1. Voila!
1b) Just do the same thing: substitute for x, then do the math.