document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=85378>Question 85378</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am really confused with this question\r<BR>\n" );
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document.write( "Use slopes to show that (a) vectors (7,-2) and (-14,4) are parallel, and (b) vectors (7,-2) and (4,14) are perpendicular </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #61564 by </B><A HREF=/tutors/aboutme.mpl?userid=scianci><B>scianci(186)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scianci><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=61564\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (a) Note how (-14 , 4) = -2(7 , -2). Since these vectors are scalar multiples of each other, by definition that makes them parallel to each other.\r<BR>\n" );
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document.write( "(b) calculate the dot product of the vectors in question: 7(4) - 2(14). Since this = 0, that shows that these vectors are perpendicular to each other. </SPAN>\n" );
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