Linear Functions Slope Intercept Form

Write the Slope-Intercept Equation:

Through (-4, -2) and (4, 0)

Mathematical Equivalence

ON

John is trying to save money this year. When he opened his account he had a balance of $300. By the end of the 12 month time span, John had $1500 in his savings account.  Find the rate of change.  Write an equation in slope-intercept form to model this situation.

• y = 100x - 300

• y = 100x + 300

• y = 1/10x + 300

• y = 1/10x - 300

Write an equation

• y = 3(5) + 25

• y = 3/5x + 25

• y = 5x + 25

• y = 3x + 25

Write the equation

• y = 25x

• y = 100x - 25

• y = -25x + 100

• y = 25/100x

Write the equation that represents this word problem: Miles makes tacos at a restaurant. He has already made 8 tacos, and can make 3 tacos per minute.

• y= 8x + 3x

• y= 3x + 8

• y= 8x + 3

• y= 3 + 8

• Answer Not Here

A man is climbing down from 100 feet high descending 30 feet per minute.

• y = - 30x + 100

• y = 100 + 30x

• y = 100x + 30

• y = 100x - 30

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

Sonya has $40 in her lunch account and pays $2 each day to eat lunch. Which equation can be used to find the amount of money Sonya has left on her account after x days?

• y = 40 + 2x

• y = - 2x + 40

• y = 2 + 40x

• y = 2 - 40x

What does the model predict for a 12 year old?

• 174

• 15

• 21

• 144

What does the slope represent on this graph?

• starts at 0

• starting salary

• Salary per Movie

• highest salary