Which situation represents a proportional relationship?
a. cost of purchasing a basket of oranges for $2.50 per pound plus $8 for the basket
b. the cost of purchasing peaches for $9 per box with the delivery change of $5
c. the cost of purchasing pears for $1.80 per pound with a coupon for $1 off per pound.
d. the cost of purchasing mangoes for $1.25 per
pound plus a shipping fee of $0.16.

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.