Question

If f(x) is parallel to the line y=3/4x+2/5, which function could be f(x)

Answer 1

If f(x) is parallel to the line y=3/4x+b ,it would have to have the same slope. 

In this equation:
y=mx+b

m= is the slope of the line.

A line parallel to the line y=3/4x +2/5 must have the same slope; that it is to say, the slope would be m=3/4

Examples:
y=3/4 x+ 50000
y=3/4 x -51/36
y=3/4 x -√2

These functions could be parallels to the line y=3/4 x +2/5