document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1179547>Question 1179547</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The graph of a linear function F passes through the point (-2,10 ) and has a slope of -2. What is the zero of F? * </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #809118 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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/cgi-bin/show-face.mpl?user=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=809118\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "You should certainly know how to use the formal mathematical formulas to answer the question, as shown (in slightly different ways) by the other tutors.<br><BR>\n" );
document.write( "But your understanding of the overall problem will be greater if you think in common sense terms about why those formulas work.<br><BR>\n" );
document.write( "A slope of -2 means you go down 2 units for every unit you move to the right when \"walking\" along the graph.<br><BR>\n" );
document.write( "You are given a point (-2,10) on the graph, and you are asked to find the x value when the y value is 0.<br><BR>\n" );
document.write( "To get from y=10 to y=0 you need to go down 10 units; since you go down 2 units for every 1 unit you move to the right, you need to move 10/2=5 units to the right to get to where y is 0.<br><BR>\n" );
document.write( "5 units to the right from your starting point at x=-2 puts you at x=-2+5=3.<br><BR>\n" );
document.write( "ANSWER: x=3 when y is 0<br><BR>\n" );
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