Answer:
g(x) = x + 3
Explanation:
The goal is to move the expression f(x) = x up by three units.
this can be written as: y = 1x + 0 in slope (m) intercept (b) format [y=mx+b)
Or simply y = x
To move y = x up by three, just add three:
g(x) = x + 3,
All points from y = 3 are now translated up by three.