ANSWER
2
EXPLANATION
The zero of a function is the point in the function where the value of the function is zero.
Simply put, we have to find the value of x that makes the function become 0.
So, we have that:
y = 5x - 10
=> 0 = 5x - 10
=> 5x = 10
Divide through by 5:
x = 10 / 5
x = 2
The zero of the function is 2.
