Direct Variation Quiz

What is a direct variation?

• A type of quadratic relationship

• A special type of linear relationship

• A type of logarithmic relationship

• A type of exponential relationship

In a direct variation, what does the constant of variation represent?

• The y-intercept of the line

• The x-intercept of the line

• The midpoint of the line

• The slope or rate of change

How can you determine if a relationship is a direct variation?

• By checking if the ratio of y to x is constant

• By checking if the sum of y and x is constant

• By checking if the product of y and x is constant

• By checking if the difference between y and x is constant

In the example with distances and time, why was the relationship not a direct variation?

• Because the time intervals were inconsistent

• Because the distances were too large

• Because the ratios were all different

• Because the ratios were all the same

What does the constant of variation represent in the equation y = 45x?

• The driver can travel 45 miles per hour

• The driver can travel 45 miles in 1 hour

• The driver can travel 45 miles in 45 hours

• The driver can travel 45 miles in total

How do you find the constant of variation in a word problem involving direct variation?

• By dividing y by x

• By multiplying y by x

• By adding y and x

• By subtracting x from y

In the hole digging example, what was the depth of the hole after 45 minutes?

• 36 inches

• 45 feet

• 36 feet

• 45 inches

What is the cost per ringtone for Phone Mix?

• $3.00

• $4.50

• $3.50

• $4.00

Which website charges more for ringtones?

• Neither charges for ringtones

• Ringtones Plus

• Phone Mix

• Both charge the same

How do you compare direct variations using a graph?

• By comparing the midpoints of the lines

• By comparing the y-intercepts of the lines

• By comparing the slopes of the lines

• By comparing the x-intercepts of the lines