document.write( "Question 655274: Can someone please help me how to write an equation for each line??\r
\n" ); document.write( "\n" ); document.write( "1) y-intercept of -2.1,x-intercept of 3.5\r
\n" ); document.write( "\n" ); document.write( "2)through(1.2,5.1),x-intercept of 3.7\r
\n" ); document.write( "\n" ); document.write( "please help me! I was sick, so i missed the lesson \n" ); document.write( "

Algebra.Com's Answer #409016 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi,
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document.write( "Using the standard slope-intercept form for an equation of a line y = mx + b
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document.write( "  where m is the slope and b the y-intercept.
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document.write( "1) y-intercept of -2.1,x-intercept of 3.5   ||Points:  (0,-2.1) and (3.5,0)
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document.write( "  y = mx + (-2.1)
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document.write( "  y = mx - 2.1
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document.write( "finding the slope m
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document.write( "(0,-2.1) and 
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document.write( "(3.5,0) m = -2.1/-3.5 = .6
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document.write( "  y = .6x - 2.1\r
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document.write( "2)through(1.2,5.1),
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document.write( "x-intercept of 3.7  Pt(3.7,0)
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document.write( "(3.7,0)
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document.write( "(1.2,5.1)  m = -5.1/2.5 = - 2.04
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document.write( " y = -2.04x + b   || Using Pt(3.7,0) to solve for b
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document.write( " 0 = 
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document.write( "7.548 = b
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document.write( "  y = -2.04x + 7.548 \n" );
document.write( "

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