Question

Indicate the equation of the line through (2, -4) and having slope of 3/5.

Answer 1

y=mx+b form where m is slope:
m=3/5

substitute 3/5 for slope:
y=3/5x+b

now substitute the point and solve for b:
-4=3/5*2+b
b=?

Answer 2

This is a perfectly acceptable way to find the desired equation. Another would be the "point-slope" formula,
\[y-y _{1}=m(x-x _{1}).\]

Answer 3

Please note that "y=3/5x+b" could be written better as y=(3/5)x+b. Less ambiguous that way.