Write ratios in their simplest form, fill in the missing term of an equivalent ratio, compute unit rates, and solve direct-proportion problems.
Read the value of y from a direct-proportion graph for a given x.
Given a ratio a:b, fill in the missing term of the equivalent ratio a·k : b·k.
Write a given ratio of two numbers in its simplest form — divide both terms by their common factor.
Word problem: a recipe is for N people. How many grams of an ingredient do you need for K people?
Find the price for one item, given the total cost for several items.