Slope and Word Problems

Suppose that a bike rents for $4 plus $1.50 per hour. Write an equation in slope-intercept form that models this situation.

• y = 4x + 1.50
• y = 1.50x + 4

 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.

• y = 20x + 5
• y = 5x +20

For babysitting, Nicole charges a flat fee of $3, plus $5 per hour. Write an equation for the cost, C, after h hours of babysitting. 

• C = 5h + 3
• C = 3h + 5
• H = 5c + 3
• H = 3c + 5

A plumber charges $25 for a service call plus $50 per hour of service. Write an equation in slope-intercept form for the cost, C, after h hours of service. 

• C = 25 + 50h
• C = 50 + 25h
• H = 25 + 50c
• H = 50 + 25c

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 = 20 + 30x
• y = 30 + 20x
• y = 50x
• y = 60x

What does "m" represent in y=mx+b?

• y-intercept
• slope
• macaroni
• nothing

If m=3 and b=6, what is the correct slope intercept equation?

• y=3-6
• y=3x-6
• y=3x+6
• y=6x+3

Suppose that a bike rents for $4 plus $1.50 per hour. Write an equation in slope-intercept form that models this situation.

• y = 4x + 1.50
• y = 1.50x + 4

Suppose that the water level of a river is 34 feet and that it is receding at a rate of 0.5 foot per day. Write an equation for the water level, L, after d days. 

• L = 34 - 0.5(d)
• L = 34(d) - 0.5
• d = 34 - 0.5(L)

You and your friends plan to attend the State fair this weekend.  Admission to the fair is $5 and the cost per rid is $0.50.  How many rides can you go on if you have $20.

• 20 rides
• 30 rides