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Unformatted text preview: Lﬁelm‘w; MTH 1825 sec. 006 — Quiz #2 Name (print) Ka y
Wednesday, Sept. 29, 2010
20 points Signature 1. (6 pts.) Graph the lines x = —3 and y = 5 on the ﬁrst set of axes. Graph the line y = 2): on
the second set of axes. Label two points on each line. 2. (2 pts. each) Find the slope of the line through each pair of points. Show all your work. a. (10,— 5) and (—2, 12) b. (4,2) and (4,7) r" v, r \i v M W I
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Answer: U) s ‘2 H (4 pts.) Find the equation, in slope—intercept form, of the line that passes through the
points (2,7) and (—5,6). Show all your work. The equation y =1.8x + 80.7 represents the median cost ofa singlefamily home in
Lansing, wherey is in thousands of dollars and x = 0 corresponds to the year 1995. a. (2 pts.) Use the linear equation to approximate the median cost of a singlefamily
home in Lansing in the year 2001. E
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‘” a“? han Answer  b. (1 pt.) What is the slope ofthe line and what does it mean in the context of this
problem? Circle the letter that corresponds to the correct statement. (A) The slope is 1.8 and it meansthat the price goes up by $1.80 per year. (B) The slope is 80.7 and it means that the price goes by $80.70 per year. The slope is 1.8 and it means that the price goes up by $1800 per year. (D) The slope is 80.7 and it means that the price was $80,700 in 1995. (E) The slope is 1.8 and it means that the price was $180,000 in 1995. (F) The slope is 80.7 and it means that the price was $80.70 in 1995. c. (1 pt.) What is the yintercept of the line and what does it mean in the context of
this problem? Circle the letter that corresponds to the correct statement. (A) They—intercept is 80.7 and it means that the price goes up by $80.70 per year. (B) Theyintercept is 1.8 and it means that the price goes up by $1800 per year. (C) The y—intercept is 80.7 and it means that the price goes up by $80,700 per year. (D) They~intercept is 1.8 and it means that the price was $1.80 in 1995. Theyintercept is 80.7 and it means that the price was $80,700 in 1995. (F) They—intercept is 1.8 and it means that the price was $18,000 in 1995. Score: / 20 ...
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 Fall '10
 Cioni
 Algebra

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