QUIZ 4 REVIEW

Write an equation of a line in slope-intercept form (y=mx + b) with given slope and y-intercept.
slope:

 $\frac{1}{2}$  ; y-intercept: - 3

• y =  $\frac{1}{2}$  x + 3

• y =  $\frac{1}{2}$  x - 3

• y = -3x +  $\frac{1}{2}$  

• y = -3x -  $\frac{1}{2}$  

Write an equation in slope-intercept form for the table.

• y = 5x + 2

• y = 5x - 2

• y = $\frac{1}{5}$ x + 2

• y = $\frac{1}{5}$ x - 2

Write an equation in slope-intercept form for the graph.

• y = $\frac{-2}{\ \ \ 3}$ x - 1

  
  

• y = $\frac{2}{3}$ x - 1

• y = $\frac{-2}{\ \ \ 3}$ x + 1

• y = $\frac{2}{3}$ x + 1

What is the equation in slope-intercept form for the graph shown?

• y = 3x - 2

• y = 3x + 2

• y = 3x - 1

• y = -3x + 1

A paint your own pottery studio charges $15 plus $8 per piece of pottery. The total cost of painting y can be represented by the equation y = 8x + 15. What does the slope represent?

• the cost per piece of pottery

• the cost to use the studio

• not enough information given

• none of these

Which equation represents the relationships shown in the table?

• y = $\frac{1}{2}$ x - 2

• y = - $\frac{1}{2}$ x - 2

• y = 3x - 2

• y = -3x + 2

y = x - 4

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y = x + 3

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• 
• 
• 

y = 4x

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• 
• 
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Intercon Phone Company’s normal rates are $10.00 as an initial fee plus $1.00 per minute for each call. For the month of June, the company reduces its call rates to $0.75 per minute. Write an equation in slope-intercept form that represents the new cost y for x minutes of calls during the month of June.

• y = 10x + 0.75

• y = 10.00 + 0.75x

• y = 10x + 75

• y = 10.00 + 75x