Interpreting Functions in Context

A company is selling bubble gum.  The function g(x)=3x+4 tells the company how much to charge if someone buys x packages of bubble gum.  Find g(8) and tell what it means within the context of the problem.

• g(8)=8.  This means that after 8 packages of gum, the company makes $8.

• g(8)=42.  This means that 8 packages of gum costs $42.

• g(8)=28.  This means that 8 packages of gum costs $28.

• g(8)=24.  This means that 8 packages of gum costs $24.

Which equation shows the number of bottles left after x days?
A family buys a case of water with 48 bottles and drinks 5 bottles per day.

• y = 48x + 5

• y = -5 + 48x

• y = -5x - 48

• y = 48 - 5x

Which of the following is another meaning of y-intercept?

• location

• initial value

• total

• constant rate

The population of the town is given by the function y = 60,000 - 500x, where y is the number of inhabitants and x is the time in years. What is the population of the town after 9 years?

• 55,500

• 55,000

• 54,500

• D:54,000

The change in temperature is given by the function y = 68 - x, where y is the temperature in Fahrenheit degrees and x is the time in hours. What is the temperature after 2 hours?

• 70

• 69

• 67

• 66

The profit of a company is given by the function y = 100,000 - 2,000x, where y is the profit in dollars and x is the time in months. What is the profit of a company after 5 months?

• $98,000

• $90,000

• $89,000

• $80,000

The amusement park charges $20 to get in plus $1.50 per ride. Which linear equation below represents this relationship.

• y=1.5+20x

• y=1.5x + 20

• y = 20x + 1.5

• y= 21.5x

Consider the function t(x)=x/8+2x.  Find t(16).

• 34

• 160

• 16

• 56

The average number of students per classroom at BHS from 2000 to 2010 can be modelled by the equation y=0.56x+27.2, where xrepresented the number of years since 2000, and y represented the average number of students per classroom. Which of the following best describes the meaning of the number 0.56 in the equation?

• The total number of students at the school in 2000.

• The average number of students per classroom in 2000.

• The estimated increase in the average number of students per classroom each year.

• The estimated difference between the average number of students per classroom in 2010 and in 2000.

In a linear function in the form y = mx + b, the b represents the:

• the starting point

• y - intercept

• x - intercept

• rate of change