Writing Function Rules Word Problems

A linear equation has a slope of 3 and a y-intercept of 2. Write the function rule for this equation.

• y = 2x - 3

• y = 3x + 2

• y = 2x + 3

• y = 3x - 2

The temperature (T) increases by 5 degrees Fahrenheit every hour. Write a function rule to represent the temperature after 'h' hours if the initial temperature is 70 degrees Fahrenheit.

• T=70 * 5h

• T=70 + 5h

• T=70 - 5h

• T=70 + 5h

The cost of renting a bicycle is $10 per hour. Write a function rule to represent the total cost (C) of renting the bicycle for 'h' hours.

• C = 5h

• C = 20h

• C = 10h

• C = 10/h

The temperature (T) decreases by 2 degrees Celsius every hour. Write a function rule to represent the temperature after 'h' hours if the initial temperature is 25 degrees Celsius.

• T=25 - 2

• T=25 - 2h

• T=25 - h

• T=25 + 2h

A car rental company charges a flat fee of $50 plus $20 per day for renting a car. Write a function rule to represent the total cost (C) of renting the car for 'd' days.

• C = 50 * 20d

• C = 50 - 20d

• C = 50 + 20d

• C = 50d + 20

A company charges $30 per month for a gym membership. Write a function rule to represent the total cost (C) of the gym membership for 'm' months.

• C = 30m

• C = 30m^2

• C = 30/m

• C = 30 + m

A phone plan charges a flat fee of $20 plus $0.10 per minute for calls. Write a function rule to represent the total cost (C) of making 'm' minutes of calls.

• C = 20 * 0.10m

• C = 20 + 0.10m

• C = 20 + 0.10m + 5

• C = 20 - 0.10m