Slope, Rate of Change, Direct Variation

Is this proportional?
y=2x

• yes

• no

Is this a direct variation?

• yes

• no

What is another name for k?

• y- intercept

• x 

• slope

• x- intercept

A person’s weekly pay is directly proportional to the number of hours worked. Shawn’s pay is $123.00 for 20 hours of work. What is the constant of variation?

• k = 123

• k = 20

• k = 6.15

• k = 0.16

Is this proportional?

• yes

• no

What is the rate of change for the following:
(4,5) (2, 15) 

• -1/5

• 1/5

• -5

• 5

Find the rate of change.

• -2 minutes per gallon

• -20 minutes per gallon

• -2 gallons per minute

• -20 gallons per minute

Calculate the rate of change.

• 6

• 1/6

• -6

• -1/6

Write an equation for this relationship.

• y=1/5x

• y=1/2x

• y=2x

• y=5x

Which statement below accurately represents the graph?

• $100 is earned for each hour worked

• $100 is earned for every 2 hours worked

• $500 is earned for every 8 hours worked

• $150 is earned for every 3 hours worked