Which of the following functions matches this graph?
A) y=x2
b)y=3x2
c)y=-1/2x2
d)y=1/10x2

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.