Answers GA-8th Grade Mathematics Using Technology to Explore DataQuestion 6

6

AssignmentMultiple Choice

Using Technology to Explore Data

Question 6 • GA-8th Grade Mathematics

Use the graphing calculator to graph the line x + y = 25. Which gives you the best view of the line?

Answer

A

x-min = –15, x-max= 5, y-min = –5, y-max = 15

B

x-min = –10, x-max= 10, y-min = -10, y-max = 10

C

x-min = 0, x-max= 30, y-min = 0, y-max = 30

D

x-min = –20, x-max= 0, y-min = -20, y-max = 0

Explanation

Rewrite the equation as y = 25 − x. The line crosses the axes at (25, 0) and (0, 25), so the viewing window should include both intercepts. Choice C, with both axes ranging from 0 to 30, shows both points and the line between them; the other windows leave at least one intercept out of view.

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