document.write( "Question 215334: I do not get the following questions:\r
\n" ); document.write( "\n" ); document.write( "y-intercept of -2.1,x-intercept of 3.5\r
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\n" ); document.write( "\n" ); document.write( "through (1.2, 5.1), x-intercept of 3.7\r
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Algebra.Com's Answer #162698 by Alan3354(69443)\"\" \"About 
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y-intercept of -2.1,x-intercept of 3.5
\n" ); document.write( "At the y-intercept, x is zero, and vv.
\n" ); document.write( "So 2 points are given, (0,-2.1) and (3.5,0)
\n" ); document.write( "The slope is diffy/diffx = -2.1/3.5
\n" ); document.write( "m = -0.6
\n" ); document.write( "Since the y-intercept is known, y = mx + b
\n" ); document.write( "y = -0.6x + 3.5
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\n" ); document.write( "through (1.2,5.1), x-intercept of 3.7
\n" ); document.write( "The x-intercept is (3.7,0)
\n" ); document.write( "m = (0-5.1)/(3.7-1.2) = -5.1/2.5
\n" ); document.write( "m = -51/25 = -2.04
\n" ); document.write( "Then use
\n" ); document.write( "y-y1 = m*(x-x1) where (x1,y1) is either point
\n" ); document.write( "y = -2.04(x - 3.7)
\n" ); document.write( "y = -2.04x + 7.548
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