document.write( "Question 837691: how do you plot two points on a graph using the equation y=mx+c where m is the slope or gradient and c is the y-intercept, and there are y and x axis, and the eqaution to be plotted is y=-x-2?
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Algebra.Com's Answer #504708 by Theo(13342)![]() ![]() You can put this solution on YOUR website! there are several ways to do it. \n" ); document.write( "one of the easiest ways is to find the x and y intercepts. \n" ); document.write( "you can find them in the following manner.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the equation is y = -x - 2\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "when x = 0, the equation becomes: \n" ); document.write( "y = -2 \n" ); document.write( "that's your y-intercept. \n" ); document.write( "the coordinates of that point are (0,-2).\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "when y = 0, the equation becomes: \n" ); document.write( "0 = -x - 2 \n" ); document.write( "add 2 to both sides of this equation to get: \n" ); document.write( "2 = -x \n" ); document.write( "multiply both sides of this equation by -1 to get: \n" ); document.write( "x = -2 \n" ); document.write( "that's your x-intercept. \n" ); document.write( "the coordinates of that point are (-2,0).\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "what you have just done is plot 2 points. \n" ); document.write( "draw a straight line between them and that's the graph of your line.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "that graph looks like this: \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "you can see that the x-intercept is at (-2,0) and that the y-intercept is at (0,-2).\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the x-intercept is the point where the graph crosses the x-axis. \n" ); document.write( "the y-intercept is the point where the graph crosses the y-axis.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "there are other ways to graph the equation. \n" ); document.write( "this is just one of them.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |