Identifying if Equations are Functions or Not Functions Quick
Check
Determine if the given equations are functions or not functions.
Functions
x= 3
Not Functions
x + y = 81
y = -x + 11
y=-5x - 12
y = 2x2 - 6x + 4
y = -7

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.