To rewrite the equation \( y = -5x + 4 \) in standard form, we want to get it into the form \( Ax + By = C \), where \( A \), \( B \), and \( C \) are integers, and \( A \) is non-negative.
Starting with the original equation:
\[ y = -5x + 4 \]
We can rearrange this to bring \( -5x \) to the left side:
\[ 5x + y = 4 \]
Now it is in standard form. Therefore, the correct response is:
5x + y = 4