Answer:
10x + 5 (or if thats a 41/2 then) 10x + 42
Step-by-step explanation:
3x + 1/2 + 7x - 4 1/2
10x + 5
or if thats a 41/2
3x + 1/2 + 7x - 41/2
10x + 42
Given:




To find:
The odd function.
Solution:
If f(-x) = -f(x), then the function is odd.
If f(-x) = f(x), then the function is even.
Option A: 
Substitute x = -x



≠ - f(x)
It is not odd function.
Option B: 
Substitute x = -x

(Since
)
≠ - f(x)
It is not odd function.
Option C: 
Substitute x = -x



≠ - f(x)
It is not odd function.
Option D: 
Substitute x = -x


It is odd function.
Therefore, f(x) = -x is an odd function.
I think it is point 3. Hope that helps