Question 123410
The slope intercept form of the line 
{{{y=mx+b}}}
will quickly give you the slope, m, and the y intercept, b.
1. y=-2x+9
m=-2
b=9
{{{ graph( 300, 300, -15, 15, -15, 15, -2x+9) }}} 
2.y=-3x+8
m=-3
b=8
{{{ graph( 300, 300, -15, 15, -15, 15, -3x+8) }}} 
3.3x-y=7  
y=3x-7
m=3
b=-7
{{{ graph( 300, 300, -15, 15, -15, 15, 3x-7) }}} 
4.2x-y=11
y=2x-11
m=2
b=-11
{{{ graph( 300, 300, -15, 15, -15, 15, 2x-11) }}}