2020 Direct Variation & Slope-Intercept Form

Determine whether the linear function is direct variation. If so, write a direct variation equation for this proportional relationship.

• y=4x

• y=1/8x

• y=1/4x

• Yes

• No

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? Also, write a direct variation equation for this situation.

• y=14x

• $308

• y=12x

• $265

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

• Yes; 1/4

• Yes; 4

• Yes; 2

• No

Suppose y varies directly with x and when y=39 , x=3. Use this information to write the direct variation equation.

• y = 26x

• y = 3x

• y = 13x

• y = 2x

Does the relationship in the table represent direct variation? If so, what is the constant of variation?

• Yes

• No

• 6

• 1/6

• 0

Does the relationship in the table represent direct variation? If so, write the direct variation equation by finding the constant of variation.

• y = 1/3x

• y = 3x

• y = 1/2x

• Yes

• No

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 the relationship in the table represent direct variation? If so, what is the constant of variation?

• Yes

• No

• 0

• 1/3

• 3

Does the relationship in the table represent direct variation? If so, what is the constant of variation?

• 8

• 16

• 24

• Yes

• No

Does the relationship in the table represent direct variation? If so, what is the constant of variation?

• yes

• no

• 3

• 2