Starting from y = -x + 4, generate the ordered pairs for x = -1, x = 1/2, and x = 3. Provide exact fractional or integer y-values and then indicate which of those points lies on the x-axis.

• A. (-1,-5), (1/2,-7/2), (3,-1); none of these points lie on the x-axis
• B. (-1,5), (1/2,3.5), (3,1); (3,1) lies on the x-axis.
• C. (-1,5), (1/2,7/2), (3,1); (-1,5) lies on the x-axis.
• D. (-1,5), (1/2,7/2), (3,1); none of these points lie on the x-axis.

Answer: (D)