Graphing Calculator Math Worksheets Scientific Calculator Chart Maker
 A+ A− B

## How do you evaluate functions?

Function Machine
You can think of $$f(x)$$ as a function machine.
The function machine, or $$f(x)$$ , takes input inside . The machine processes this input and produces an output value
Practice Problems

 Problem 1) Let $$k(x) =3x$$. Evaluate $$k (5 )$$
 Step 1

 Problem 2) Let $$g(x) =3x^2 + 7x$$. Evaluate $$g( 4)$$
 Step 1

Problem 3) Let $$h(x) =\sqrt{x^3 -4}-|x|$$.
Evaluate $$h( 5)$$
 Step 1

Problem 4) Let $$f(x) = -3x^2 + 5x - 1$$.
Evaluate $$f(6)$$
 Step 1

Problem 5) The height in meters of a projectile at t seconds can be found by the function $$h(t) = -5t^2 + 40t + 1.2$$.
Find the height of the projectile 4 seconds after it is launched.
 Step 1

Problem 6) A substance has a half life of 26 years. The amount of remaining substance in grams after t years can be found by the function $$h(t) = 250 (0.5)^{ \frac{t}{25} }$$.
How much substance remains after 98 years?
 Step 1