Which of the following points is a solution to the system of equations shown? y-x= -1
x + y = -5
(-3,-2)
0 (-6,1)
01-2, -3)

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.