Direct Indirect Variation

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

• Yes; 1/4

• Yes; 4

• Yes; 1/2

• No

Does the relationship represent direct variation?

• Yes

• No

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

• Yes; 8

• Yes; 16

• Yes; 24

• No

Which of the following represents direct variation?

• y = kx

• y = k/x

• y = x/k

• y = mx + b

The image is an example of the graph of a(n)

• direct variation

• inverse variation

• neither

• both

Which of the following represents indirect variation?

• y = kx

• y = k/x

• y = x/k

• y = mx + b

The cost of producing pencils varies directly with the number of pencils produced. If the cost of producing 12,800 pencils is $400, then what will be the cost of production for 15,000 pencils?

• $468.75

• $512.00

• $341.33

• $412.80

y varies directly with x, and y is 84 when x is 16. What is the constant of proportionality?

• y = (21/4)x

• k= 21

• k= 5.25

• k= 4/21

The amount of money earned on a job is directly proportional to 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 this a direct variation?
y=2x

• yes

• no