The graph for the equation y = negative 2 x + 1 is shown below.

On a coordinate plane, a line with negative slope goes through (0, 1) and (1, negative 1).

If another equation is graphed so that the system has no solution, which equation could that be?
y = negative 2 (x minus one-half)
y = negative one-half (4 x + 2)
y = negative x + 1
y = negative one-half x + 2