document.write( "Question 274972: write the equation of a line in standard form if m=-3/5 and contains (7, -11)
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Algebra.Com's Answer #200643 by dabanfield(803)\"\" \"About 
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write the equation of a line in standard form if m=-3/5 and contains (7, -11)\r
\n" ); document.write( "\n" ); document.write( "One standard form of a line is the slope-intercept:\r
\n" ); document.write( "\n" ); document.write( "y = m*x + b\r
\n" ); document.write( "\n" ); document.write( "In this form m is the slope of the line and b is the value of y when x is zero( that is the value of y where the line crosses the y-axis).\r
\n" ); document.write( "\n" ); document.write( "In this case m = -3/5 so we have:\r
\n" ); document.write( "\n" ); document.write( "y = (-3/5)*x + b\r
\n" ); document.write( "\n" ); document.write( "Since the line passes through the point (7,-11) we know that when x = 7,
\n" ); document.write( "y = -11.\r
\n" ); document.write( "\n" ); document.write( "So substituting in the equation above we have:\r
\n" ); document.write( "\n" ); document.write( "-11 = (-3/5)*7 + b
\n" ); document.write( "-11 = -21/5 + b
\n" ); document.write( "b = 21/5 - 55/5 = -34/5\r
\n" ); document.write( "\n" ); document.write( "The equation of the line then is:\r
\n" ); document.write( "\n" ); document.write( "y = (-3/5)*x - 34/5\r
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