document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=78780>Question 78780</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How do I solve f(x)= -3x+4 to find the slope and y intercept ? </SPAN>\n" );
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document.write( "True fact about lines:\r<BR>\n" );
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document.write( "If you see f(x) = woodchuck x + giraffe<BR>\n" );
document.write( "then can know it is a line, and the slope of the graph of the function f<BR>\n" );
document.write( "is woodcheck, and the y-intercept is giraffe\r<BR>\n" );
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document.write( "your woodhcuck is -3 and your giraffe is 4\r<BR>\n" );
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document.write( "You have f(x) = -3 x + 4<BR>\n" );
document.write( "the slope is -3<BR>\n" );
document.write( "the y-intercept is 4\r<BR>\n" );
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document.write( "The y-intercept the point (0, f(0)).<BR>\n" );
document.write( "f(0) is -3 * 0 + 4 which is 4<BR>\n" );
document.write( "Your y-intercept is (0,4).  This is a point on the y-axis four units above the x-axis.\r<BR>\n" );
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document.write( "The slope is the change in y if x changes by 1\r<BR>\n" );
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document.write( "The slope of a line is the change in y when x changes by 1\r<BR>\n" );
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document.write( "f(0) = woodchuck * 0 + giraffe  and your giraffe is 4<BR>\n" );
document.write( "f(1) = woodchuck * 1 + giraffe  and your woodchuck + giraffe is -3+4 = 1\r<BR>\n" );
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document.write( "You see the change is woodchuck which is -3\r<BR>\n" );
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document.write( "This is known as mx+b standard form where the slope is called m instead of woodchuck and the y-intercept is known as b instead of giraffe.\r<BR>\n" );
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document.write( "It might help you to know a slope 0 goes horizontally across the page, slope 1 goes diagonally like this / and slope -1 goes diagonally like this \ and also vertical lines do not have a slope.  Slope 8 is a steeper slope upwards and to the right, and slope -8 is a steeper slope downwards, and small slopes like +1/4 or -1/4 rise or sink gradually as you move to the right (positive x axis).\r<BR>\n" );
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