Final answer:
The midpoint of the line segment with endpoints P1 (35) and P2 (28) is (31.5, 0).
Step-by-step explanation:
To find the midpoint of a line segment, we average the x-coordinates and the y-coordinates of the endpoints. The x-coordinate of the midpoint is found by averaging the x-coordinates of P1 and P2: (35 + 28) / 2 = 63 / 2 = 31.5. The y-coordinate of the midpoint is found by averaging the y-coordinates of P1 and P2: (0 + 0) / 2 = 0. Hence, the midpoint of the line segment is (31.5, 0).