Representing and Interpreting Functions

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

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

Eduardo had eight dollars, then he started to save a dollar a week. Which equation can be used to find how much money Eduardo will have at the end of the month?

• y = 1 + 8

• y = 8x

• y = x + 8

• y = ⁸/_x

A babysitter’s earnings e are a function of the number of hours n worked at a rate of $7.25 per hour.

• e = 7.25-n

• e = 7.25n

A man is climbing down from 100 feet high descending 30 feet per minute. Which function models his descent?

• y = 100 - 30x

• y = 100 + 30x

• y = 100x + 30

• y = 100x - 30

Logan Howlett’s Gym charges an initial membership fee of $25 and $10 per month. Write a function that best represents the relationship between the number of months, m, and the total charge, c?

• c(m) = 10m + 25

• m(c) = 10c + 25

• c(m) = 25m + 10

• m(c) = 25c + 10

Richard sells sodas for $1.50 each. It cost Richard $10 to buy the sodas. Which function could best represent p, the profit, Richard made from selling sodas?

• p = 1.50s + 10

• p = 10s - 1.50

• p = 1.50 - 10s

• p = 1.50s - 10

John owns a taxi service that charges a flat fee of $3.00 plus an additional $.25 per mile. Which of the following equation models John's pricing?