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PLEASE I NEED HELP ASAP!!!!

Use Vertex form to write the equation of the parabola.

A. y = 3 (x+2)^2 + 2

B. y = 3 (x-2)^2 - 2

C. y = (x+2)^2+ 2

D. y = 3 (x-2)^2 + 2

PLEASE I NEED HELP ASAP!!!! Use Vertex form to write the equation of the parabola-example-1

2 Answers

5 votes
filling this spot in and agree that the answer is A. 
User Avi Tsadok
by
8.5k points
4 votes
The vertex form is

y = a {(x - h)}^(2) + k
where a is the coefficient, and (h,k) is the vertex. Looking at the graph, we see that the vertex is (-2,2), so h is -2 and k is 2. We see that the parabola opens upwards, so A is positive, and is stretched by a factor of 3. (We can find this by looking where the (1,1) should be. We go over 1 from the parabola, and see where the y coordinate is. This is at (-1,5), or 1 unit right and 3 units up.) Therefore, our a is 3. Plugging this into the vertex form:

y = 3 {(x + 2)}^(2) + 2
Which is answer A
User Martin Fehrs
by
8.0k points

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