Interpreting Slope/Y-Intercept

Christopher purchases a plant from a gardening store. The height of the plant, in centimeters, after m months is given by the equation h = 12 + 3m

Which choice correctly interprets the slope?

• The plant grows 3 centimeters more for every 1 month that passes

• The plant grows 1 centimeter more for every 3 months that pass

• The plant grows 12 centimeters more for every 1 months that pass

• The plant grows 1 centimeters more for every 12 months that pass

The graph shows the balance of a college student over the course of 100 days.

Which choice correctly calculates the slope and interprets its meaning?

• The college student spent $1 every day

• The college student spent $10 every day

• The college student gained $10 every day

• The college student gained $1 every day

The Clear View Cleaners uses the equation C = 84.25w+156 to determine the amount to charge for cleaning a company's outside windows, where w is the number of glass walls the building has and C is the cost in dollars.

What is the significance of the number 84.25 in the equation?

• For every increase of 1 glass wall, the cost increases by $84.25

• For every increase of 1 glass wall, the cost decreases by $84.25

• For every increase of 1 glass wall, the cost increases by 84.25%

• For every increase of 1 glass wall, the cost decreases by 84.25%

A school ordered three different types of jumbo cookies to sell at a fundraiser. There are x chocolate chip cookies, y sugar cookies, and z peanut butter cookies. The total cost in dollars of the cookies is given by the expression below.

2x + 5y + 3z

What do the coefficients in the expression represent?

• the total number of cookies ordered

• the total amount in dollars spent on each type of cookie

• the cost in dollars of each type of cookie

• the number of each cookie purchased

• the final height of the candle

• the rate at which the candle is burning

• the amount of time it will take the candle to burn

• the initial height of the candle