Writing and interpreting functions

Delicious Bakery has a monthly budget of d dollars. Every month, it spends $3,080 on employee salaries. One-fourth of the remaining budget is spent on ingredients. Which function can be used to find the amount, in dollars, spent on ingredients each month?

• $f\left(x\right)\ =\ 3,080\ +\ \frac{x}{4}$

• $f\left(x\right)\ =\ 3,080\ -\ \frac{x}{4}$

• $f\left(x\right)\ =\ \frac{x+3,080}{4}$

• $f\left(x\right)\ =\ \frac{x-3,080}{4}$

You go to Circle K to buy some gas and notice that it costs $4.29 per gallon g. Write an equation that represents the total price P of gas

A water tank already contains 55 gallons of water when Baxter begins to fill it. Water flows into the tank at a rate of 8 gallons per minute. Write a linear equation to model this situation. Find the volume of water in the tank 25 minutes after Baxter begins filling the tank.

• 255

• y = 8x + 55

• 1383

• y = 55x + 8

Carlos collects baseball cards. He has 50 the first year, 100 the second year and 150 the third year. Write a function that represents the number of cards as a function of the number of years, t, for Carlos' baseball card collection.

• f(t) = 50 + t

• f(t) = 50t

• f(t) = 100t

• f(t) = 50t + 100

A business manager has a starting annual salary of $42,000. Each year, the business manager will get a salary increase of 5.5%. Which function represents the business manager's salary, S, after t years?

A canoe rental service charges a $20 transportation fee and $30 dollars an hour to rent a canoe. Write an equation representing the cost, y, of renting a canoe for x hours. What is the cost of renting the canoe for 6 hours?

• 200

• y= 30x + 20

• x + 30y -20

• 160

A plant is 5cm tall and growing at a rate of 3cm a month. Let x represent months and f(x) represent the height of the plant after x months. Write a function that represents the situation. DO NOT TYPE ANY SPACES

Your parents bought you a $100 gift card from the game store. Each game cost $5. Write an function rule that represents the balance b after purchasing games g.

• b = 100 - 5g

• b = 100 + 5g

• b = 105g

• b = 100

A man is climbing down from 100 feet high at a rate of 30 feet per minute.

• f(x) = - 30x + 100

• f(x) = 30x + 100

• f(x) = 100x + 30