Direct Variation

 Y varies directly with x, and y is 84 when x is 16. Which equation represents this situation?

• y=1344x
• y=100x
• y=5.25x
• y=4/21x

If y vaires directly with x and y= 12 when x= 15. What is the value of x when y= 16?

• 12.8
• 20
• 11.25
• 19

In a direct variation, y = 39 when x = 3. 
Find the value of y when x = 2.

• 26
• 3
• 58.5
• 2

If y vaires directly with x and y= 12 when x= 15. What is the value of x when y= 16?

• 12.8
• 20
• 11.25
• 19

What does the Direct Variation Equation look like?

• Y= kx
• y = mx + b
• y = b
• y = x

The gallons of water used to take a shower varies directly with the number of minutes in the shower. If an 8 minute shower uses 48 gallons of water, find the constant of variation.

• k = -6

• k = 6

• k = 8

• k = 48

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

• 150.67 minutes

• 102.18 minutes

Is the relationship in the table a direct variation?

• Yes

• No

Is the relationship in the table a direct variation?

• Yes

• No