Proportionality in Equations

Determine the missing value in the table.

• 15

• 3

• 1/3

• 9

Tags

CCSS.MATH.CONTENT.7.RP.A.2

What is the Unit Rate?

• 60 miles/1 hour

• 120 miles/ 2 hours

• 1 mile/ 1 hour

Tags

CCSS.MATH.CONTENT.7.RP.A.2

The graph above shows the price of games in dollars.  Is the graph proportional and how do you know?

• The graph is proportional  because it is linear.

• The graph is proportional because it is linear and passes through the origin.

• The graph is not proportional because it does not pass through the origin.

• The graph is not proportional because it is not linear and it does not pass through the origin.

Tags

CCSS.MATH.CONTENT.7.RP.A.2

The constant of proportionality in the equation y = ½x is _______. 

• x

• y

• 1/2

• 2

What is the constant of proportionality?

• $3

• No COP

• $2

• $9

Write an equation for this relationship.

• y = 18x

• y = 18.50x

• y = 22.50x

• There is no COP.

A student studies the same amount of time each day for a test. In 4 days, she studied 60 minutes. Which equation shows this relationship? Let x = the number of days.

• y = 4x

• y = 15x

• y = 60x

• y = 12x 

Is the given table a direct variation? If so, what is the constant?

• Yes; 1/4

• Yes; 4

• Yes; 2

• No

What ordered pair does a direct variation always go through when graphed?

• (0, 0)

• (1, 0)

• (0, 1)

• (1, 1)

Does the table represent a proportional relationship?

• Yes.

• No.