Answer: use division
Step-by-step explanation:
X intercepts are = 0 and 20
Maximum value = (10,15)
These can simply be read off of the graph.
The intervals of increasing from x = 0-10 and that shows the ball going up. Decreasing from 10-20 and that is the exact opposite.
The rate of change is often referred to as slope. The slope for the section described in part B is -1. It can be used by following the slope formula below:
y2 - y1/x2 - x1
explanation: 1/3=2/6 is multiplied by 2 in the numarator and the denominator but in 1/6=3/6 you multiply only the numerator by 3
Since x is the number of seconds it took the rock to hit the water, x is the value that we are looking for. When the rock hits the water, it's height is 0, therefore, f(x) = 0. So, we can set the expression on the right equal to 0, and solve for 0. Let's do just that:

We can divide by -16, nothing will happen because 0 divided by anything is 0:

To factor any trinomial in standard form (given below), we must find two numbers that add to "b" and multiply to "c":

So, for this specific question, let's find two numbers that add to -8 and multiply to 9. These are clearly 9 and -1. We can write it in this way now:

Both answers would be valid, but there can't be negative time, so your answer is
"It takes 9 seconds for the rock to reach the water."
Answer:
The answer is C
Step-by-step explanation:
Hope this helps