AnswersNC-Math 1 CRSlope-Intercept Form of a Line

Slope-Intercept Form of a Line Answers

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1
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What is the slope of the line represented by the equation y = x – 3?

Question illustration
A
–3
B
Negative StartFraction 4 Over 5 EndFraction.
Option B
C
StartFraction 4 Over 5 EndFraction.
Option C
D
3
3

Which statements are true about the lines? Select three options.

A
Line WZ has the same slope as line XY.
B
Line YX has a greater slope than line ZY.
C
Line XW has a lesser slope than line YZ.
D
Line ZW has the same y-intercept as line YZ.
E
Line XY has a lesser y-intercept than line XW.
4

Grace is comparing cell phone plans. A prepaid phone plan costs $0.20 per minute and has no monthly fee. A contracted phone plan costs $50 per month and $0.02 per minute. How will the graphs of the monthly costs of the two cell phone plans compare where x represents minutes purchased in a month?

A
The prepaid phone plan will have a steeper line and lower y-intercept.
B
The contracted phone plan will have the same steepness and a higher y-intercept.
C
The prepaid phone plan will have a less steep line and the same y-intercept.
D
The contracted phone plan will have a steeper line and same y-intercept.
7

What is the y-intercept of the function f(x) = –x + ?

Question illustration
A
Option A
B
Option B
C
StartFraction 1 Over 3 EndFraction.
Option C
D
StartFraction 2 Over 9 EndFraction.
Option D
9

What is the slope of the line represented by the equation y = –x + ?

Question illustration
A
Option A
B
Option B
C
StartFraction one-fourth EndFraction.
Option C
D
StartFraction one-half EndFraction.
Option D
10

A coordinate plane with a line passing through (negative 4, 3), (0, 1), and (2, 0).

Question illustration
A
slope: –2; y-intercept: 2
B
slope: ; y-intercept: 1
Option B
C
slope: ; y-intercept: 2
Option C
D
slope: 2; y-intercept: 1

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