Linear Functions

Write the following equation in slope intercept form. 
8x + 4y = 16

• 4y = -8x + 16
• y = 16 - 4x
• y = -2x + 4
• y = 4 + 2x

Identify the Intercepts. 
3x - 9y = 27

• x-intercept (-3, 0) 
  y-intercept (0, 9)
• x-intercept (-9, 0) 
  y-intercept (0, 3)
• x-intercept (3, 0) 
  y-intercept (0, -9)
• x-intercept (9, 0) 
  y-intercept (0, -3)

Which of the following could represent a direct variation relationship?

• y = 6x
• xy = 6
• y = 3x + 6
• y = 3x²

Determine the slope of the line that goes through the points (-4, -17) and  (-4, -3). 

• 0
• 3
• undefined
• -4

Identify the intercepts. 

• x-intercept (0, 2)
  y-intercept (-6, 0)
• x-intercept (-6, 0)
  y-intercept (0, 2) 
• x-intercept (0, -6)
  y-intercept (2, 0) 

The function A(x) = 12x + 50 represents the amount A, in dollars, that Tom is paid based on the hours, x, he works. How much does Tom make each hour he works and what does that represent?

• $50, this represents the slope of the function
• $12, this represents the slope of the function
• $50, this represents the y-intercept of the function
• $12, this represents the y-intercept

Write an equation in standard form for the given situation:  Mojo has joined a weight loss program.  His weight is 225 lbs and he is losing weight at a rate of 3 lbs per week.

• 225x - 3 = y
• 3x + y = 225
• -3x + y = 225
• 3x - y = 225

A fitness walker walking at a constant speed finishes her first 2.2 mile lap around a lake in 44 minutes. How long will it take her to walk 9 miles?

• 96.8 minutes
• 198 minutes
• 19.8 minutes
• 180 minutes

Which linear function has initial value of 5?
y=5x+4
y=4x+5
y=−4x−5
y=−5x+4

• y=5x+4
• y=4x+5
• y=−4x−5
• y=−5x+4

Write the equation 4x-2y=10 in slope-intercept form.

• y = 2x + 5
• y = -4x - 5
• y = 2x - 5
• y = 4x - 5