Ratios and Proportional Reasoning Vocab

2 ratios with the same or constant rate/ratio

• proportion

• direct variation

• rate

• origin

a constant ratio or unit rate of two variable quanities. it is also called the constant of variation

• unit rate

• proportion

• constant of proportionality

• complex fraction

the relationship between two variable quantities that have a constant ratio

• constant of proportionality

• direct variation

• dimensional analysis

• unit rate

A ratio that compares 2 quantities with different kinds of units

• proportion

• rate

• unit rate

• direct variation

• 1 29/35 teaspoons

• 35/64 teaspoons

• 5 3/5 teaspoons

• 5/28 teaspoons

• $3

• $23.25

• $8.73

• $79.75

A rate with a denominator of 1 (per 1 unit)

• Unit rate

• Ratio

• Fraction

• Ratio table

When all ratios are equivalent (equal)

• Proportional Relationships

• Unit Rate

• Ratio Table

• Simplify

Pencils are $4.00  for 10 pencils.  If the car shown is speeding to bring you a pencil for math class, what is the cost per pencil or the unit rate?   What is the cost for 5 pencils?
Make a ratio table or a proportion to find the answers.

• $0.40 per pencil; $2.00 for five pencils

• $3.24 per pencil; $5.00 for five pencils

• $1.00 per pencil; $5.00 for five pencils

• $1.44 pencil; $5.88 for five pencils

• $12

• $120

• $221

• $21