Answer:
No
Step-by-step explanation:
Explanation 1)A vertical line can be represented by the equation x=a, where a can be any number. If you think about it, there is no y in the function, this making it not a function.
Explanation 2) For a line to be a function it has to pass the vertical line test, so you will draw a vertical line through the function and if it touches more than one point then it is not a function. In this case if you draw a vertical line through a vertical line there are an infinite number of places where the lines intercept, so it is not a function.
I have done the segment 1 pratice exam
Answer:

Step-by-step explanation:
we know that
To find the speed divide the total distance by the time
so

Yes What do you need help with ?
The first two pairs.. just substitute the x-coordinate and find y