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Key Concept Quiz 6.7
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1
Consider the linear system y = x – 3 and y = –x –1. Solve the system graphically.
A)(1, 2)
B)(1, –2)
C)(2, –1)
D)(2, –1)
2
Consider the linear system <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0070973199/362684/pom9_ch6_sec7_quiz1_ques2_pic1.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (1.0K)</a> and <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0070973199/362684/pom9_ch6_sec7_quiz1_ques2_pic2.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (1.0K)</a>. Solve the system graphically. Use a graphing calculator to help you.
A)(–2, –2)
B)(–2, 2)
C)(2, 2)
D)(2, –2)
3
<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0070973199/362684/pom9_ch6_sec7_quiz1_ques3.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (9.0K)</a> Leighton entered two equations in his graphing calculator as shown. What is the solution?
A)(–5, 2)
B)(5, 2)
C)(–5, –2)
D)There is no solution. The lines are parallel, and do not intersect.
4
Consider the linear system y = 3 and x = 2. What is the solution?
A)(2, 3)
B)(3, 2)
C)(–2, –3)
D)There is no solution.
5
Sunita needs to park her car every weekday while she takes a summer course. She can buy a monthly pass for $82, or she can register for $10 and then, pay $6 per day. Find the number of days of parking that make the two plans cost the same.
A)20
B)15
C)12
D)10





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