Two Variable Equations

What is the slope of the line that contains these points?

Ever since Bozo moved to his new home, he's been keeping track of the height of the tree outside his window.

H represents the height of the tree (in centimeters), t years since Bozo moved in.

H = 210 + 33t

How fast does the tree grow?

• 210 centimeters per year

• 33 centimeters per year

• 6.36 centimeters per year

Jay is mowing lawns or a summer job. For every mowing job, he charges an initial fee of $10 plus a constant fee for each hour of work. His fee for a 5-hour job would be $35. Let F represent Jay's fee (in dollars) for a single job that took t hours for him to complete. Which equation represents the relationship between the fee and number of hours?

• F = 35t + 10

• F = 45t

• F = 10t - 35

• F = 5t + 10

What is the slope of this line?

• -1

• 1

Mr Fic is not very handy around the house. He is considering hiring an electrician to change a light bulb in his lamp. Zappo Electricians charges a $70 consulting fee, and $45 per hour. Rypoff & Sons charges a $50 consultation fee, and $55 per hour. For how many hours will the cost of either company be the same?

• 2 hours

• 3 hours

• 5 hours

• 4 hours

Set up an equation and solve: Mr Fic loves Cinnabon. For lunch he had two cokes which were 275 calories each, and a bunch of Cinnabons which were 880 calories each. If he consumes a total of 19,910 calories at lunch, how many Cinnabons did he eat?

• 4.8 Cinnabons

• 22 Cinnabons. Disgusting

• 12 Cinnabons

• 21 Cinnabons

-15 = -4m + 5

• 4

• 7

• 5

2x - 8 = 6

• 3

• 8

• 7

2x - 3 + 4x = 27

• 12

• 4

• 5

• 15

3x + 2(4x - 4) = 3

• 4

• 3

• 2

• 1