Algebra I Unit 4 MU Review

While Jayden was at school, his house lost electrical power. By the time the electrical power came back on, the temperature inside the house was 86°F. The air conditioner immediately started to cool the house.Let f(x) represent the temperature, in degrees Fahrenheit, of Jayden’s house x minutes after the air conditioner started to cool the house.What is the meaning of the statement f(25)=78? (Lesson 2)

• After 78 minutes, the house was cooled to 25 degrees

• After 25 minutes, the house was cooled to 78 degrees

• After 78 minutes, the house was warmer than when Jayden got home

Alex rode his bike for 30 minutes. He kept a record of his biking speed, in miles per hour (mph), for each 5-minute interval. The table shows the changes in the biking speed for different time intervals. Consider a graph in the xy-coordinate plane of Alex's biking speeds as a function of time, in minutes. Assume that the increases and decreases in the running speed were constant. In which time interval is the graph of the function increasing? Select all that apply (Lesson 6)

• 0 to 5 minutes

• 5 to 10 minutes

• 10 to 15 minutes

• 15 to 20 minutes

Function f gives the temperature, in degrees Celsius, t hours after midnight. Use function notation to write an equation or expression for each statement. (Lesson 2)

The temperature at 1 p.m.

Function f gives the temperature, in degrees Celsius, t hours after midnight. Use function notation to write an equation or expression for each statement.

The temperature was the same at 9 a.m. and at 4 p.m. (Lesson 3)

Function f gives the temperature, in degrees Celsius, t hours after midnight. Which statement describing the equation below?

f(11)=12 (Lesson 2)

• The temperature at 12pm is 11 degrees C

• The temperature at 11pm is 12 degrees C

• The temperature at 11am is 12 degrees C

Which is greater L(16) or S(16)?

(Lesson 9)

• L(16)

• S(16)

True or False?

L(9) = S(9)

(Lesson 9)

• True

• False

A bagel shop owner bakes 100 bagels for the day and sells 12 bagels each hour. The function b gives the number of bagel remaining after h hours. What values complete the table and the rule in function notation? (Lesson 4/5)

• 1. 24

  2. 60

  3. 12h

• 1. 76

  2. 40

  3. 100-12h

A bagel shop owner bakes 100 bagels for the day and sells 12 bagels each hour. The function b gives the number of bagel remaining after h hours. Solve the equation b(h) = 4 and explain what is means in this situation. (Lesson 4/5)

• 12(4) = 48, which means there are 48 bagels left

• 100 - 12h = 4, h = 8 which means after 8 hours there are 4 bagels left

The table shows the percentage of voters between 1988 and 2016. Find the average percentage increase between 1988 and 2016. (Lesson 6)