Slope Intercept Real World

Joe tracked the height of his Dalmatian puppy from age 13 weeks to 25 weeks. He graphed the data and determined the line of best fit is y hat= 1.12x + 28.78. What does the slope represent in this situation?

• The puppy weighed 28.78 pounds at age 13.

• For every week that goes by, the puppy gains 1.12 pounds.

• The puppy gains a pound every 1.12 weeks.

• The puppy weighs 1.12 pounds when it was born.

• A
• B
• C
• D

Paisley is saving up to buy a new jacket. She already has $85 and can save an additional $9 per week using money from her after school job.

What is the y-intercept?

• 85

• 9

• -85

• -9

AJ is driving to a concert and needs to pay for parking. There is an automatic fee of $9 just to enter the parking lot, and when he leaves the lot, he will have to pay an additional $3 for every hour he had his car in the lot. Write an equation to model this situation.

Faith has a smart phone data plan that costs $45 which includes 3 GB of data, but will charge an extra $20 per GB over the included amount.

Write an equation to model this situation.

Adam signed up for a streaming music service that costs $13. The service allows Adam to listen to unlimited music, but if he wants to download songs for offline listening, the service charges $1 per song.

Write an equation to model this situation.

Julia is driving on a long road trip. She currently has 10 gallons of gas in her car. Each hour that she drives, her car uses up 1 gallon of gas.

What is the y-intercept?

• 10

• 1

• -10

• -1

What is the meaning of the slope in the context of the problem?

• The pool water is decreasing in 3 gallons per minute.

• The pool water is increasing in 3 gallons per minute.

• The time for the pool water to increase is 3 minutes.

• The time for the pool water to decrease is 3 minutes.

What is the meaning of the slope in the context of the problem?

• It costs $3 for each book.

• The cost of 3 books.

• Each book costs $1.

• $1 for 3 books.

Find the equation of the line.

• y = -1.5 x - 2

• y = -2 x +1.5

• y = 2 x +1.5

• y = 1.5 x - 2