Hello there!
This parabola opens up because the leading coefficient is positive. In this case, the leading coefficient is 1.
If you want to find the leading coefficient, look at the term with the highest exponent. Look at the number behind it.
I really hope this helps!
Best wishes:)
A straight angle is a flat line, or 180 degrees.So Take that number and divide by 3. I get 60, so I double that to get two thirds, and the answer is 120 degrees.
a. At its maximum height, the ball has zero vertical velocity, so
b. The ball's height in the air 
at time 
is given according to
Solve for when 
:
Tan B=x/3
3 x Tan 70 degrees
3x2.74 =8.22
X=8.22
