STAAR Review Proportionality Tutorials (2025)

Triangle KLM is similar to triangle RTU. The triangles are shown with side lengths in centimeters.

What is the length of side RU in centimeters?

Tags

CCSS.HSG.SRT.A.2

A survey of 150 employees at a company asked which type of transportation the employee used to get to work.

If Bicycles is 10%, then how many more people use a car than ride a bicycle to get to work?

(Car% - bicycle%) x 150 = ?

Tags

CCSS.6.RP.A.3C

The cost of groceries for the Nguyen family was $210.00. The family used a coupon for 25% off the cost. 

 

What was the final cost after the coupon was used?

Cost - discount = ? or 75% x 210

Tags

CCSS.6.RP.A.3C

The ratio of blue to yellow to green gumballs in a gumball machine is 4 : 3 : 1.

There are 24 yellow gumballs in the machine.

How many blue gumballs are in the machine?

Spinner X is divided into 4 equal sections, and Spinner Y is divided into 3 equal sections. The possible outcomes for each spinner are shown in the tree diagrams.

 

Both spinners are spun at the same time. What is the probability that Spinner X will land on 2 and Spinner Y will land on blue?

Tags

CCSS.7.SP.C.8B

A diver had descended 64 feet underwater after 4 minutes.

After 6 minutes, the diver had descended 96 feet underwater.

 

What is the constant of proportionality that relates the number of

feet descended, y, to the number of minutes, x?

Tags

CCSS.7.RP.A.2B

Tags

CCSS.5.MD.A.1

A deck of cards contains red, blue, orange, and yellow cards.

A card is drawn and then replaced.

This process is carried out 40 times.

Based on these results, what is the experimental probability that the next card drawn is red or (+) orange?

Tags

CCSS.7.SP.C.6

In a city, the average cost of electricity is $0.12 per kilowatt-hour.

Which graph best represents this relationship?

12 kwh x 0.12 = ?

• 
• 
• 
• 

Tags

CCSS.8.EE.B.5

Tags

CCSS.8.EE.B.5