The interquartile range of the data set is 4. 2,2,3,3,4,5,5,6,7,9,12

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

You can find the constant of proportionality by finding the ratio of

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18