document.write( "Question 263166: find equation of a line with slope and given point. m=-4, (4,8) \n" ); document.write( "

Algebra.Com's Answer #193926 by oberobic(2304) $\"\"$ $\"About$

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y = mx+b
\n" ); document.write( "y = -4x + b
\n" ); document.write( ".
\n" ); document.write( "We're told one point on the line: (4,8)
\n" ); document.write( "So, when x=4, y = 8
\n" ); document.write( "Substituting,
\n" ); document.write( "8 = -4(4) + b
\n" ); document.write( "8 = -16 + b
\n" ); document.write( "24 = b
\n" ); document.write( "b = 24
\n" ); document.write( ".
\n" ); document.write( "y = -4x + 24
\n" ); document.write( ".
\n" ); document.write( "x = 0, y = 24
\n" ); document.write( "x = 6, y = 0
\n" ); document.write( ".
\n" ); document.write( "Check the graph
\n" ); document.write( " $\"graph%28500%2C500%2C-30%2C30%2C-30%2C30%2C-4%2Ax%2B24%29\"$
\n" ); document.write( ".
\n" ); document.write( "Done \n" ); document.write( "

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