Slope Intercept Form Word Problems Graphs

Jackson started with $800 in his savings account, but has to pay $30 a month for his electricity bill. Which equation relates his savings, y, to the amount of months, x?

• y = -30x + 800

• y = 30x - 800

• y = -30x

• y = 12x - 30

Stephanie owes her mom $80 for a recent trip to the mall. She plans to payback $15 a month until it is paid back. Which equation relates the amount she owes, y, to the amount of months, x?

• y = 15x + 80

• y = -15x + 80

• y = -15x - 80

Which equation represents the table relating x and y in slope-intercept form?

• y = 2x + 2

• y = -3x + 2

• y = 6x + 5

• y = -2x - 2

What is the equation for this table?

• y=2x+5

• y=2x+3

• y=-2x+5

• y=-2x+3

In order to join an online learning community, there is a $20 startup fee and a $5 monthly fee. Write an equation in slope-intercept form that models this situation.

Abi is flying a helicopter! She is currently 45,000 feet in the air and descends 3,500 feet every minute. Write an equation to model this.

• y=3500x+45000

• y=45000x-3500

• y=-3500x+45000

• y=-45000x+3500

A canoe rental service charges a $20 transportation fee and $30 dollars an hour to rent a canoe. Write an equation representing the cost, y, of renting a canoe for x hours.

• y = 30x + 20

• y = 30 + 20x

• y = 50x

• y = 60x

Bob has $150 in his savings account and saves $40 per month.  Which equation represents the amount Bob has in his account after x months?

• y = 150 + 40

• y = 40x + 150

• y = 150x + 40

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

The temperature in a city is decreasing at a rate of 2 degrees per hour. If the current temperature is 25 degrees, write an equation in slope-intercept form to represent the temperature as a function of time.

• y = -2x + 25

• y = -2x - 25

• y = 2x + 25

• y = 2x - 25