7th Grade Writing Equations for Proportional Relationships

What equation should you use when writing an equation for a proportional relationship?

• y = x + k

• y = kx

• x = yk

• x = ky

Tags

CCSS.7.RP.A.2C

The value of y is proportional to x. When x = 3 then y = 15. Which equation represents the relationship between x and y?

• y = 0.2x

• y = 5x

• y = 12x

• y = 45x

Tags

CCSS.7.RP.A.2C

Irma wants to save up some money to buy a new smartphone, so she babysits on the weekends. There is a proportional relationship between the time Irma spends babysitting (in hours), x, and the amount of money she earns babysitting (in dollars), y. Which equation represents the relationship between x and y?

• y = 1/8x

• x = 8y

• y = 8x

• x = 1/8y

Tags

CCSS.7.RP.A.2C

Ammonie used a table to record how far and how much time she rode her bicycle. What equation could she use to determine how many miles she would ride, m , if she traveled any number of hours, h?

• m = 15.5h

• h = 42m

• m = 14h

• h = 3.5m

Tags

CCSS.5.OA.B.3

The graph shows the relationship between plates (x) and pounds (y) and can be represented with the equation y = 2x. Which of the following is true?

• For every 1 plate, the weight is 2 pounds.

• For every pound, there are 2 plates.

• For every 1 plate, the weight is 1/2 pound.

• For every pound, there is 1/2 plate.

Tags

CCSS.7.RP.A.2D

Besian bought 6 ice cream cakes for $48 dollars. Write an equation that represents the total cost, y, of, x ,ice cream cakes.

• 6x= 48y

• y= 8x

• x= 6y

Tags

CCSS.7.RP.A.2C

Write the equation that shows the relationship between the gallons, g, and t the time.

• g = 1t

• t = 1g

• t = 5g

• g = 5t

Tags

CCSS.5.OA.B.3

Write the equation for the table given.

Tags

CCSS.5.OA.B.3

Write the equation of the proportional relationship using the format y = kx.

Tags

CCSS.7.RP.A.2C

Write the equation that shows the relationship between the number of hours (h) and the total dollar amount (t).

• t = 9h

• h = 9t

Tags

CCSS.5.OA.B.3