standard_description: Understand that a function from one set (called the domain) to another set (called the range) assigns to each element of the domain exactly one element of the range. If f is a function and x is an element of its domain, then f(x) denotes the output of f corresponding to the input x. The graph of f is the graph of the equation y = f(x).
problem_activity: Write the formula for the functions depicted by the graphs below.
$${f(x)=}$$
$${g(x)=}$$
$${h(x)=}$$
[IMG]


aligns: no