The vertex of this parabola is at (-4, -1). when the y-value is 0, the x-value is 2. what is the coefficient of the squared term in the parabola's equation?

This is a parabola in vertex form,

a is the coefficient on y^2 we seek.  Since it's sideways we have p=-1, q=-4

When y=0,

A

Option A

Step-by-step explanation:

The shape of the vertex of a parabola is:

Where the point (k, h) is the vertex of the parabola and "a"  is the coefficient of the squared term.

In this case we know that the vertex of this parabola is:

(-4, -1)

Then:

and

So the equation is:

We know that whe the y-value is 0, the x-value is 2.

This mean  that:

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation: