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Question

# A ball is tossed into the air. The function f(x)= -16x^{2} +4x+5 represents the height in feet of the ball x seconds after it is thrown. At what height was the ball tossed into the air ?

## The correct answer is: C= 5

### Solution:-

We have given a function of a ball which is tossed in air which represents the height in feet of ball x seconds after it is thrown .

So, when the ball was tossed x = 0

So for x= 0 the value of function will be y- intercept

The standard quadratic form is ax^{2}+bx+c=y

In this the term c gives us the y-intercept of the curve

The given function is

f(x)= -16x^{2} +4x+5

In the given case c gives the height from which the ball is thrown.

C= 5

So, height from which the ball is tossed is 5 feets.

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