Look at the table for f(x). What type of function do you think the values represent? How do you know?
Linear; when x increases by 1, the value of f(x) increases by a constant difference (3).
What kind of function is g(x)? How do you know?
Exponential; as x increases by 1, the value of g(x) increases by a constant factor (2).
In function notation, how would you write an equation that represents f(x)? What about g(x)?
f(x)=3x+3g(x)=5\cdot2^x
What is the value of f(4)? How do you know?
15, because f(4)=3(4)+3=15.
What is the value of g(4)? How do you know?
80, because g(4)=5\cdot2^{(4)}=80.