Direct Variation & Slope-Intercept Form

 Suppose y varies directly with x, and y is 84 when x is 16. What is the constant of proportionality, m for this situation?

• y = (21/4)x
• k= 21
• k= 5.25
• k= 4/21

Write a direct variation equation for this proportional relationship.

• y=4x
• y=1/8x
• y=1/4x
• y=8x

The amount of money earned on a job is varies directly with the number of hours worked.  If $70.00 is earned in 5 hours, how much money is earned in 22 hours of work?

• $2
• $308
• $1.57
• $265

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

• Yes; 1/4
• Yes; 4
• Yes; 2
• No

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

• 26
• 3
• 58.5
• 2

Tags

CCSS.8.EE.C.7

CCSS.8.F.A.1

CCSS.8.F.B.4

Does the relationship in the table represent direct variation?

• Yes
• No

Write a direct variation equation for this proportional relationship.

• y = 1/3x
• y = 3x
• y = 1/2x

It costs $3.60 for Jennie to buy 3 pounds of apples to make her famous apple pies. How much does it cost Jennie per pound?

• $1.00 per pound
• $3.60 per pound
• $1.20 per pound
• $1.10 per pound

Does this table represent a proportional relationship?

• Yes
• No
• Xfinity
• English is the best class ever!

What is the constant of proportionality, m, represented in this table?

• 8
• 16
• 24
• 2