Answer:
No
Explanation:
y - x = 4 can be rewritten as
y = x + 4
This is the equation of a line, so this equation is linear.
For an equation to be direct variation, it must have the form
y = kx, where k is a number called the constant of proportionality.
If you rewrite y = x + 4 as y = 1x + 4, you still have the 4 there that cannot be in a direct variation equation.
Answer: No,