write the equation in slope-entercept form.

W(-1, 2.4) and S(5, 2.4)

m=2.4-(5)
______
2.4-(-1)
for the answer I get -2.6
_____
3.4

is this right if not please show me where I got off track.

Both points S and W have the same Y-value. The slope of the line between them is zero.

The formula for m in this case is
m = (2.4-2.4)/(5 -(-1)) = 0/6 = 0

The equation of the line is is y = 2.4