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Key Quiz 3.4
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1
What are the slope and y-intercept of the line shown?
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A)slope = -2; y-intercept = 1
B)slope = -2; y-intercept = -1
C)slope = 2; y-intercept = 1
D)slope = - (1/2); y-intercept = 1
2
Which of the following is the equation of the line with slope - (2/3) and y-intercept 4?
A)y = 4x - (2/3)
B)y = - (2/3)x - 4
C)y = - (2/3)x + 4
D)y = 4 + (2/3)x
3
Which of the following is the equation of the line with slope 5 passing through the point (-2, 4)?
A)y = 5x - 6
B)y = 5x + 14
C)y = 5x - 14
D)y = 14x + 5
4
Which of the following is the equation of the line passing through both (-2, 0) and (4, 3)?
A)y = (1/2)x + 1
B)y = (3/2)x - 3
C)y = 2x + 4
D)y = (1/2)x - 1
5
Serge is interested in a cellphone package that charges a $50 connection fee and $4.50 per month for unlimited calls and text messaging. Which of the following represents the correct calculation of the cost for 2 years worth of service?
A)C = 4.5(2) + 50
   = $59

B)C = 4.5 + 50
   = $54.50

C)C = 50(24) + 4.50
   = $1,204.50

D)C = 4.5(24) + 50
   = $158






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