Question 1017301
{{{ y = m*x + b }}}
{{{ m = -3 }}}
{{{ b = 1 }}}
Your equation looks like:
{{{ y = -3x + 1 }}}
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Then you have the point-slope formula:
{{{ m = ( y[2] - y[1] ) / ( x[2] - x[1] ) }}}
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This formula gives you the slope, {{{ m }}},
when you plug in 2 points on the line:
( x1, y1 ) and
( x2, y2 ) 
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For the given line, your points could be:
( 0, 1 ) and ( 1, -2 )
See if the formula works:
{{{ m = ( y[2] - y[1] ) / ( x[2] - x[1] ) }}}
{{{ m = ( -2 - 1 ) / ( 1 - 0 ) }}}
{{{ m = -3/ 1 }}}
{{{ -3 = -3 }}}
OK