Grade 7 Mod 1 Review

Understanding Proportional Realtionships

100

If I have 7 green m&m in a jar of 30 what is the ratio of green m&m to all of the candy in the jar? 

7:30

200

If my ratio for lemon juice is 1/2 a cup for 3 cups of water. How much lemon juice would I need for 9 cups of water 

1.5 cup or 3/2 cups. 

300

If Nora earns $55 after working for 5 hours, what is her hourly pay? 

$11

400

When going to a car wash you pay $10 for them to wash the outside of your car, and $9 everyone 15 minutes to clean the inside of your car. How much would you pay for a outside car wash and 1 hour of interior work? 

$46

500

I earned $30 this week from my job, how many $5 foot long subway sandwiches can I buy? 

6

Working with Proportions

100

What variable do we use to represent unit rate in our unit rate equation? 

k or u

200

If I'm trying to find a y value, what other two numbers do I need in our unit rate equation? 

x and unit rate. 

300

Write an equation with a unit rate of 1/2

y=1/2x

400

What is the equation we use to determine unit rate? 

y/x

500

If I'm looking for an x value, what other two variables do I need to know to solve? 

y and the unit rate. 

Scale Drawings

100

What is it called when we change the size of a drawing proportionally? 

Scaling

200

What is it called when I scale an image bigger? 

Enlarging? 

300

What is it called when I scale an image smaller? 

reducing

400

What equation can I use to determine the scale rate between two images. 

y/x 

500

If x is my original image is .4, and y in my scaled image is 1.6. What is my scale rate? 

4