Urgent!!
This graph represents a quadratic function.
What is the value of a in this function's equation?

A. 1
B. -1
C. -2
D. 2

Given:

Given that the graph of the quadratic function.

We need to determine the value of a in the function's equation.

Value of a:

The value of a can be determined using the formula,

where (h,k) is the vertex and a is a constant.

From the graph, it is obvious, that the vertex of the parabola is (0,9).

Thus, substituting the vertex (h,k) = (0,9) in the above formula, we get;

 -------- (1)

Let us substitute any one of the coordinate that the graph passes through to determine the value of a.

Let us substitute the point (3,0) in the equation (1), we have;

Thus, the value of a is -1.

Hence, Option B is the correct answer.

first option

a function is a relation in which an input is paired with exactly one output.

so, let's find the right answer.

in our first option, our inputs are january, february, and march. the outputs are 30, 28, and 25. each input has it's own output. this is correct!

our second option we know is incorrect, because ms. valverade has two outputs, dogs and cats. this is not a function.

our third option is incorrect as well. the yellow square has two ouputs, the square and the triangle.

lastly, in our fourth option, we see the number 7 two times with a different output. therefore, this is not a function.

remember: each input must be paired with only one output!

468

step-by-step explanation: