Answer:
9x
Step-by-step explanation:
Let the number be x.
0
anythibg times zero equals 0
<em>1, 4.5</em>
for midpoint
x₁ = -2, y₁ = 0
x₂ = 4, y₂ = 9
(x₁+x₂)/2 , (y₁+y₂)/2
(-2+4)/2 , (0+9)/2
2/2 , 9/2
1, 4.5
