10-9 Direct Variation

What does "k" stand for in the direct variation equation?

• constant of equality

• constant of proportionality

• constant of non-proportionality

Tags

CCSS.HSF-LE.A.1B

Which of the following is the equation format for direct variation?

• y = mx + b

• y = kx

Is the relationship in the table a direct variation?

• Yes

• No

Is the relationship in the table a direct variation?

• Yes

• No

What is the constant of proportionality?

(the k value)

Tags

CCSS.HSF-LE.A.1B

Select all the equations that represent a direct variation:

• 
• 
• 
• 

The value of y is directly proportional to the value of x.

If y = 132 when x = 11, what is the value of y when x = 17?

• y = 144

• y = 12

• y = 204

• y = 71

The value of y varies directly with x. If x = 195 when y = 15, what is the value of x when y = 9?

• y = 1.44

• y = 117

• y = 12

• y = 135

The number of pages that Hayden can read varies directly with the time spent reading.

If he reads 12 pages in 4 minutes, how many pages can he read in 17 minutes?

• 51 pages

• 47 pages

• 60 pages

• 75 pages

The number of miles Jim runs is directly proportional to the time spent running.

If he runs 6 miles in 46.8 minutes, how long will it take him to run 13.1 miles?

• 92.35 minutes

• 7.8 minutes

• 102.18 minutes

• 150.67 minutes

Tags

CCSS.6.RP.A.3C