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Key Concept Quiz 6.1
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1
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Which line has a slope of ⅓ and a y-intercept of –2?
A)(i)
B)(ii)
C)(iii)
D)(iv)
2
Line (ii) in question#1 has the equation
A)y = 2x + 3.
B)y = –3x + 2.
C)y = 3x – 2.
D)y = –2x + 3.
3
Which line in question#1 has a slope which is undefined?
A)(i)
B)(ii)
C)(iii)
D)(iv)
4
Which line in question#1 has the equation y = –2?
A)(i)
B)(ii)
C)(iii)
D)(iv)
5
A propane delivery tanker started with a full tank. The graph shows the amount remaining after each delivery. Identify the slope and y-intercept, and explain what they mean.
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A)The slope is 10. The y-intercept is 90. The truck started with a load of 90 m3 of propane, and delivered 10 m3 at each stop.
B)The slope is –10. The y-intercept is 90. The truck started with a load of 90 m3 of propane, and delivered 10 m3 at each stop.
C)The slope is 90. The y-intercept is –10. The truck started with a load of 10 m3 of propane, and delivered 90 m3 at each stop.
D)The slope is 90. The y-intercept is 10. The truck started with a load of 10 m3 of propane, and delivered 90 m3 at each stop.







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