
<h2>
Explanation:</h2>
The vertex form of the equation of a parabola is given by the following form:

In this exercise, we have the following equation:

From here, we can conclude that:

Since the leading coefficient is less than zero, the parabola open downward. So, the graph is shown below and the vertex has been indicated.
<h2>Learn more:</h2>
Finding leading coefficient: brainly.com/question/1469367
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Answer:
B
Step-by-step explanation:
Because there is three numbers
<span>3 cans store
9 tennis balls.
Find the Constant of proportionality and write and equation with regards to
this given situation:
=> number of tennis balls = 9
=> number of cans = 3
</span>
<span>So the
constant of proportionality is in the
working column. Pls see attached.<span>
</span></span>