Unit 4 Functions Review

Unit 4: Functions Review

Multiple Choice

The table below shows the temperature, T, in Tucson, Arizona t hours after midnight.

What was the average rate of change in temperature from midnight until 3 a.m.?

• 3 degrees/ hr

• 3.75 degrees/hr

• -3 degrees/ hr

• -15/3 degrees/hr

Multiple Choice

The table below shows the temperature, T, in Tucson, Arizona t hours after midnight.

What was the average rate of change in temperature from 3 a.m. until 4 a.m.?

• 6 degrees/ hr

• -6 degrees/hr

• -3 degrees/ hr

• -15/4 degrees/hr

Multiple Choice

Is the relation a function:

The assignment of students to locker numbers.

• Yes, a function

• No, not a function

Multiple Choice

Is the relation a function:

Input: (State) Output: (City)

• Yes, a function

• No, not a function

Multiple Choice

Is the relation a function?

• Yes, a function

• No, not a function

Multiple Choice

Is the relation a function?

• Yes, a function

• No, not a function

Multiple Choice

Is the relation a function?

• Yes, a function

• No, not a function

Multiple Choice

Function W gives a kitten's weight, in ounces, as a function of time, in weeks, since birth.

What does W(2)=8 represent?

• The kitten weights 8 pounds, 2 weeks after birth

• The kitten weighs 2 pounds, 8 weeks after birth

• The kitten weights 8 ounces, 2 days after birth

• The kitten weights 8 ounces, 2 weeks after birth

Multiple Choice

Function T gives a toddler's height, in inches, as a function of time, in months, since birth.

What does T(20)=31 represent?

• The toddler is 20 inches tall after 31 months.

• The toddler is 31 inches tall after 20 days.

• The toddler is 31 inches tall after 20 months.

• The toddler is 20 inches tall after 31 days.

Multiple Choice

At noon, a news organization published a piece of breaking news on its website. The function Q gives the number of visitors, in thousands, to the website h hours after the news was published.

Which statement in function notation correctly represents that at 2:30 p.m. the news article had been viewed by 1.6 million visitors.

• Q(2:30)=1.6

• Q(2.5)=1,600

• Q(2.5)=1,600,000

• Q(2:30)=1,600,000