Representing Situations with Equations

Alex bought a new truck for $42,935. According to the dealer, the truck will depreciate(lose value) approximately $4,200 per year. Which equation best describes the value of his truck?

• y= -4200x+42935

• y= 4200x+42935

• y= 4200x-42935

• y= -4200x-42935

A group of mountain climbers begin an expedition with 250 pounds of food. They plan to eat a total of 12 pounds of food per day. What does the y-intercept mean in this situation?

• Eating 12 pounds of food per day

• Beginning the trip with 250 pounds of food

• 262 pounds of food on the first day

• 238 pounds of food on the first day

Gourmet chocolate costs $5.25 per pound. Which equation best represents y, the total cost of x pounds of chocolate?

• x = 5.25y

• y = 5.25 + x

• y = 5.25x

• x = 5.25 +y

Which of these equations represent the table above if the number of tickets represents x and the total cost represents y?

• y=2x

• y=54x

• y=27x

• y=x

Which equation matches the description if x is the number of minutes and y is the total cost.

• y = 1.20

• y= 1.20x

• x = 1.20

• x = 1.20y

Each pizza at Pizza Hut, p, costs $5.50. Which of the following equations best represents the cost, c, of buying p, pizzas?

• m = 5.50 + c

• c = 5.50 + m

• p = 5.50m

• c = 5.50p

The table shows the ounces of water,y, need to for x number of servings.

Based on the information in the table, which equation can be used to model the relationship between x and y?

• y = 2x

• y = x + 2

• y = 18x

• y = x + 18

Greg gets paid $6 an hour working in a garden. Use the equation m=6h, where m is the money he makes, and h is the hours he works. How much money does he make if he works 9 hours?

• $15

• $3

• $54

• $53

Which equation represents the table of values?

• y = 400

• y = 400x

• y = x + 400

• y = 400x + 800

The graph shows the total money earned at a fundraising car wash. Which equation can be used to find the total earned y for the number of cars washed x?

• y = x + 5

• y = x/5

• y = x - 5

• y = 5x