The graph shows four lines Y1 - 4x + 3, Y2 - 2x - 3.73 --2x - 3 and 4 --4x + 3. What does switching the sign of the coefficient in front of x do to the line?
A)
It makes the line become steeper.
B)
It makes the line become shallower.
C)
It moves the line up on the coordinate plane.
D)
It makes the line change from increasing to decreasing