The lines when drawn on the coordinate grid are shown attached.
How to draw the lines?
y = 5:
This is a Horizontal line with a slope of 0 and y-intercept at 5. This is because as there is no slope, this would simply cross the y - axis.
y = 2x - 1:
Upward sloping line with a slope of 2 and y-intercept at -1.
y = -2x + 1 :
Downward sloping line with a slope of -2 and y-intercept at 1.
y = -0.5x - 1 :
Downward sloping line with a slope of -1/2 and y-intercept .