Evaluating functions

4 videos
2 skills
Learn how to find the value of a function for a given input value.

What is a function?

VIDEO 7:57 minutes
Functions assign a single unique output for each of their inputs. In this video, Sal gives many examples of various kinds of functions.

How to evaluate a function given its formula (example)

VIDEO 0:59 minutes
Sal evaluates f(x)=49-x^2 at x=5.

How to evaluate a function given its graph (example)

VIDEO 0:44 minutes
Sal evaluates a function at x=-1 using the graph of that function.

Evaluating functions

Evaluate functions at a specific input value, given either the functions' formula or their graph.

How to evaluate an expression that contains function notation (example)

VIDEO 1:23 minutes
Sal evaluates -2*f(-6)+g(1) given the graphs of f and g.

Evaluating function expressions

Evaluate expressions that contain function notation, given the functions' graphs.