You can determine if the answer is positive or negative because the even numbers are positive and the odd numbers are negative
Answer:
Integers, and rational numbers
Step-by-step explanation:
Integers are any positive or negative whole numbers
Rational numbers are any positive or negative numbers
Whole numbers are any positive whole numbers
Real numbers are any positive whole numbers but doesn’t include 0
Answer:

Step-by-step explanation:
There is a formula that can be used to find the x-value of the vertex of the parabola. This formula is 
We have the function 
From this function, we can find that

We can plug in our know values into the formula to get

Then we can plug in our x-value to find the y-value of the vertex

This means that the vertex would be 
She estimated by rounding 907 -> 900 and 626 -> 630 and when you subtract them, you get 270, which is how she estimated >300 people would arrive in the afternoon