which of these are an example of the x-intercept?

1. y= mx + b
2. when y =0
3. rise/run = change in y /change in x
4. when
5. when x and y both= 0
6. distance of a line segment between 2 points
7. the initial amount
8. y = slope + x-intercept

2. when y = 0

5. when x and y both = 0

which is the best one

2. when y = 0

The x-intercept occurs when the value of y is 0, so this is the best example of the x-intercept among the options provided.