Understand the concept of a ratio and use ratio language to describe
a ratio relationship between two quantities. For example, “The ratio
of wings to beaks in the bird house at the zoo was 2:1, because for
every 2 wings there was 1 beak.” “For every vote candidate A received,
candidate C received nearly three votes.”

Standard:

Math.6.RP.2 or 6.RP.A.2

Description:

Understand the concept of a unit rate a/b associated with a ratio a:b with b ≠ 0, and use rate language in the context of a ratio relationship. For example, “This recipe has a ratio of 3 cups of flour to 4 cups of sugar,
so there is 3/4 cup of flour for each cup of sugar.” “We paid $75 for 15 hamburgers, which is a rate of $5 per hamburger.”

Standard:

Math.6.RP.3a or 6.RP.A.3.A

Description:

Make tables of equivalent ratios relating quantities with whole-number measurements, find missing values in the tables, and plot
the pairs of values on the coordinate plane. Use tables to compare
ratios.

Standard:

Math.6.RP.3b or 6.RP.A.3.B

Description:

Solve unit rate problems including those involving unit pricing and
constant speed. For example, if it took 7 hours to mow 4 lawns, then
at that rate, how many lawns could be mowed in 35 hours? At what
rate were lawns being mowed?