Identify Slope and Y-Intercept from a Real-Life Problem

Suppose you are saving for a new skateboard. You currently have $10 that you put in an envelope to save. Each week you put $5 in that envelope. If this were to be written as a function, how would 10 and 5 be represented?

• 10 would be the slope; 5 would be the y-intercept

• 10 would be the y-intercept; 5 would be the slope

• 15 would be the y-intercept

• 15 would be the slope

Maggie is knitting blankets for the residents of a local nursing home. She already has 6 blankets completed. After one week, Kay has 8 blankets. After two weeks, Kay has 10 blankets. Describe the parameters of Maggie's situation.

• The x-values are positive and the y-values are positive.

• The x-values are negative and the y-values are positive

• The y-intercept is 6 and the slope is 2.

• The y-intercept is 2 and the slope is 6.

Which of the following situations could be descried by the equation y= -25x + 120

• There are 120 people in the football stadium, and 25 more are entering each hour.

• A plumber charges $25 for a house call and $120 per hour.

• A teacher has 120 students. Her third period has 25 students

• There are 120 gallons of water in a tank. It releases water at a rate of 25 gallons per minute

The table represents a used car salesman's monthly salary including commission made on the sale of cars.  What is the y-intercept and what does it represent?

• The y-intercept is $850/car and it represents the commission per car sold.

• The y-intercept is $1500/car and it represents the commission per car sold.

• The y-intercept is $1500 and it represents the monthly salary before commission.

• The y-intercept is $2775 and it represents the monthly salary before commission.

• A
• B
• C
• D

• A
• B
• C
• D

• A
• B
• C
• D

What is the rate of change for the following graph?

• 80

• 20

• 40

• 160

• Function
• Not a Function