document.write( "Question 41518: my question is I need to write the equation for the line satisfying the given information, then write it in slope-intercept form. Graph the equation, and show both of the intercepts.
\n" ); document.write( "Passes through the points (10,42.3)(20,51.5)
\n" ); document.write( "Passes through through the points(100,2.2)(150,1.9)
\n" ); document.write( "passes through the poins(1/2,-1/2) with slope 1/2
\n" ); document.write( "passes through the points(-10.4,0.3)(5,34,000)
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Algebra.Com's Answer #26805 by psbhowmick(878)\"\" \"About 
You can put this solution on YOUR website!
For determination of the equation of a straight line passing through two points, whose coordinates are given, see my answer to this question.\r
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\n" ); document.write( "\n" ); document.write( "http://www.algebra.com/cgi-bin/jump-to-question.mpl?question=41158\r
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\n" ); document.write( "\n" ); document.write( "For the slope-intercept form of the straight line obtained as above procede as follows. If the equation be ax + by + c = 0 (in general form), then take the whole part of the equation excepting the y-part on the right. Thus you have by = -ax - c. Now divide both sides by the coefficient of y. Thus we get \"y+=+-%28a%2Fb%29%2Ax+-+c%2Fb\". This is the slope intercept form of the st. line ax + by + c = 0 and its slope is \"-a%2Fb\" and point of intersection with y-axis is (0,\"-c%2Fa\"). To see an example refer to my solution to this question.\r
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\n" ); document.write( "\n" ); document.write( "http://www.algebra.com/cgi-bin/jump-to-question.mpl?question=40798\r
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\n" ); document.write( "\n" ); document.write( "For expressing the equation of a straight line thus obtained in intercept form to find out the intercepts on the coordinate axes see my solution to this question.\r
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\n" ); document.write( "\n" ); document.write( "http://www.algebra.com/cgi-bin/jump-to-question.mpl?question=41324\r
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\n" ); document.write( "\n" ); document.write( "Now, to find the equation of a st. line passing through a given point and having a given slope, follow the procedure below.
\n" ); document.write( "Here, we are reqd. to find a st. line whose slope is \"1%2F2\" and which passes through the point (\"1%2F2\",\"-1%2F2\").
\n" ); document.write( "Let the equation be y = mx + k where m = slope and k = intercept on y-axis.
\n" ); document.write( "So m = \"1%2F2\".
\n" ); document.write( "Hence y = \"1%2F2\"x + k
\n" ); document.write( "or 2y = x + 2k
\n" ); document.write( "Now, this st. line passes through the point (\"1%2F2\",\"-1%2F2\") so its equation must be satisfied by the coordinates of this point.
\n" ); document.write( "Hence, \"2%2A%28-1%2F2%29+=+1%2F2+%2B+2k\"
\n" ); document.write( "or \"2k+=+-1%2F2+-+1+=+-3%2F2\"
\n" ); document.write( "or \"k+=+%28-3%2F2%29%2F2+=+-3%2F4\"
\n" ); document.write( "Thus the reqd. equation of the given st. line is
\n" ); document.write( "\"2y+=+x+%2B+2%28-3%2F4%29\"
\n" ); document.write( "or \"2y+=+x+-+3%2F2\"
\n" ); document.write( "or 2x - 4y = 3
\n" ); document.write( "Now, express this equation in intercept form and get the answer.\r
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\n" ); document.write( "\n" ); document.write( "Draw the graphs yourself.
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