document.write( "Question 51247: Can someone please explain how to figure this problem? Determine the equation of the line that has a slope of -3 and passes through the point (-3,0). Write the equation in slope intercept form. \n" ); document.write( "
Algebra.Com's Answer #34182 by darq(90)\"\" \"About 
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slope intercept form = y = mx+b\r
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\n" ); document.write( "\n" ); document.write( "b is y intercept so we need to find the y value when x is 0. substitute the (-3,0) with (x,y) in the slope intercept form.\r
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\n" ); document.write( "\n" ); document.write( "y = mx+b
\n" ); document.write( "0 = m*-3+b
\n" ); document.write( "we know that slope is negative 3.
\n" ); document.write( "0 = -3*-3+b
\n" ); document.write( "0 = 9+b
\n" ); document.write( "b= -9\r
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\n" ); document.write( "\n" ); document.write( "so substitute m and b values with m and b in the slope intercept form.\r
\n" ); document.write( "\n" ); document.write( "y=-3x+(-9)
\n" ); document.write( "y=-3x-9
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