Answer:
y is the number of apples.
Step-by-step explanation: Because if x is the cost for one apple then y is for the number of apples.
If there are no repeating x values and an x value only goes to <em>one</em><em> </em>y value, then yes, it is a function.
Answer:
t = 5 seconds
Step-by-step explanation:
It is given that, the height h, in feet of a ball above the ground is given by :

Where t is in seconds
We need to find how long does it take the ball to hit the ground? When it hits the ground, its height will be equal to 0. So,

Neglecting negative time.
It means ball will take 5 seconds to hit the ground.
I think the answer is: ACD