5.7.1: Exercises
( \newcommand{\kernel}{\mathrm{null}\,}\)
For the following exercises, evaluate the functions at the values f(−2),f(−1),f(0),f(1), and f(2).
f(x)=4−2x
f(x)=8−3x
f(x)=8x2−7x+3
f(x)=3+√x+3
f(x)=x−2x+3
f(x)=x3
For the following exercises, determine whether the ordered pairs represent a function.
{(−1,−1),(−2,−2),(−3,−3)}
{(3,4),(4,5),(5,6)}
{(2,5),(7,11),(15,8),(7,9)}
{(−3 ,9),(−2,4),(−1,1),(0,0),(1,1),(2,4),(3,9)}
{(9,−3),(4,−2),(1,−1),(0,0),(1,1),(4, 2),(9,3)}
For the following exercises, determine whether the mapping represented a function.
For the following exercises, determine whether the equations represent y as a function of x.
5x+2y=10
y=x2
x=y2
3x2+y=14
2x+y2=6
y=−2x2+40x
For the following exercises, use the vertical line test to determine which graph represents a function.
For the following exercises, use the set of ordered pairs to find the domain and the range.
{(−3,9),(−2,4),(−1,1),(0,0),(1,1),(2,4),(3,9)}
{(−9,−3),(−4,−2),(−1,−1),(0,0),(1,1),(4,2),(9,3)}
{(−3,27),(−2,8),(−1,1),(0,0),(1,1),(2,8),(3,27)}
{(−3,−27),(−2,−8),(−1,−1),(0,0),(1,1),(2,8),(3,27)}
For the following exercises, use the graph to find the domain and the range.