Final answer:
To translate the graph of the function f(x) = 2x - 3 by 4 units down, subtract 4 from the original function to get f(x) = 2x - 7.
Step-by-step explanation:
To translate the graph of a function f(x) = 2x - 3 4 units down, we need to subtract 4 from the original function:
f(x) = 2x - 3 - 4
f(x) = 2x - 7
So, the new equation would be f(x) = 2x - 7.