REVIEW- Linear Equations

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

• y-intercept
• slope
• macaroni
• nothing

A fitness club opens with 80 members. Each month the membership increases by 15 members.

Part A: Which equation represents the relationship between the number of months the club has been opened, x, and the total fitness club membership, y?

Part B: How many members will there be after 10 months?

Hint: Find m and find b. Then plug into slope-intercept form.

• Part A: y=15x

  Part B: 150 members

• Part A: y=15x+80

  Part B: 230 members

• Part A: y=15x+80

  Part B: 105 members

• Part A: y=80x+15

  Part B: 815 members

What is the slope of a horizontal line?

• Undefined

• 0

• 1

• -1

What is the slope of a vertical line?

• Positive

• Negative

• Zero Slope

• Undefined

Mrs. Colson is hiking down a mountain side. She starts at altitude of 500 meters. She hikes down at a rate of 4 meters per minute.

Part A: Which equation models the altitude (A) as it relates to the time (t) in minutes.

Part B: What is Mrs. Colson's altitude after 5 minutes?

• Part A: A = 500t - 4

  Part B: 2496 meters

• Part A: A = 4t + 500

  Part B: 520 meters

• Part A: A = - 4t +500

  Part B: 480 meters

• Part A: A= - 4t + 500

  Part B: 491 meters

• Part A: A = 500t - 4

  Part B: 491 meters

Given the table, write the equation in the slope-intercept form.

(When x is 0, the y value is the y intercept)

• y = 1/3x + 6

• y = 3x + 6

• y = 2x + 6

• y = 1/2x + 6

Which best describes this equation?
y= 3.75x + 2

• Proportional 
• Non-proportional

Which best describes the equation?
y = 75x

• Proportional
• Nonproportional

Does this graph represent a proportional relationship?

• Yes, because the line is pretty.
• No, because the line goes through the origin.
• Yes because the line goes through the origin.
• No, because the graph is non-proportional.

What does 'b" represent in y=mx=b

• y-intercept
• macaroni
• nothing
• slope