Find the slope of (1, 2), (-1, -2). reduce all fractional answers to lowest terms

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.

20y5 times 2 is 1010 times -2 is -20, plus y