Let's analyze the coefficient of the linear term (the \( x \) term) in each of the given expressions:
-
\( 3x^2 - x - 4 \):
- The coefficient of \( x \) is \( -1 \).
-
\( 2x^2 + 6x - 1 \):
- The coefficient of \( x \) is \( 6 \).
-
\( -2x^2 + x + 7 \):
- The coefficient of \( x \) is \( 1 \).
-
\( -x^2 + 3x + 1 \):
- The coefficient of \( x \) is \( 3 \).
The expression with a coefficient of \( -1 \) for the \( x \) term is: \( 3x^2 - x - 4 \).