Understanding linear functions

6. AMUSEMENT PARKS The waiting time to ride a roller coaster is 20 minutes when 150 people are in line. How long is the waiting time when 240 people are in line?

• 32 People
• 32 Min.
• 12.5 Min.
• 12.5 People

Independent Variable: Time spent playing fortnite

• Dependent Variable: friends on fornite

• Dependent Variable: level on fornite

There are 75 pieces of candy in a 15 oz bag.

How many pieces are there per ounce?

• 5 pieces

• 0.2 pieces

• 50 pieces

• 60 pieces

1.42x

• increase of 42%

• decrease of 42%

• neither

What is the constant of proportionality? Remember to simplify your answer.

• k=9

• k=10

• k=90

• k=10/9

• k=1

What is the initial value for this data set?

• 1

• 15

• 0

• Cannot be determined

Answer explanation

Work backwards to find the value of y when x=o

What is the relationship between rate of change and the direction of a function?

• Rate of change and direction of a function are unrelated
• Rate of change and direction of a function change at an inflection point
• A positive rate of change means the function is increasing, while a negative rate of change means the function is decreasing
• A positive rate of change means the function is concave up, while a negative rate of change means the function is concave down

• -4

• -1/4

• 3

• -2

10^-2

• 0.1

• 0.01

• 0.001