Can someone help me? i'm confunsed and I don't know anything

See Below

Step-by-step explanation:

ABCD primes all correspond to x and y values on the graph.

A=

B=

C=

D=

1) y- intercept

2) time of max height

3) time when balloon hits ground

4) x-intercept

5) max height  

6) Initial height

So lets look at (0,A)

This would count as the y - intercept as well as the height they started throwing the balloons.

Soo

A = y-intercept; Initial height

Now, (B,C)

This is the highest point on the graph, therefore it would be the max time and max height.

If we look at this as a person behind the line throwing the ballon, the y would be the height and the x would be the time

B = Time of max height

C=Max height

(D,0)

From the visual above, this point would be where the balloon hits the ground

From the visual in our head, x is time and y is height

Since d is the x, it is the time when the balloon hits the ground. And since

y =0, D is also the x intercept

D =  x intercept, Time when balloon hits ground

Therefore,

A = y-intercept; Initial height

B = Time of max height

C=Max height

D =  x intercept, Time when balloon hits ground

Hope this helps! =D

Yes

Step-by-step explanation:

because 5-1 = 4 so the answer is 15 so 3y is 15