Posted by **Melinda** on Sunday, December 11, 2011 at 11:29am.

Whats the value of a? =-=

For the graph, determine the equation of the function in the form y=a(x-h)^2+k.

Then describe the transformations that were applied to y=x^2 to obtain the graph.

Here is the graph: imgur dot com/A7e5M

The only thing I know is that:

1. Reflected in x-axis

2. vertical shift UP 2

Whats the vertical compression/stretch? halps~

- Precalculus -
**Reiny**, Sunday, December 11, 2011 at 1:12pm
This time I was able to see your graph,

the new vertex is (0,2) and another point on it is (1,-1)

so if the parent equation is y = x^2

the new equation is

y = a(x-0)^2 + 2

y = ax^2 + 2

but the point (1,-1) lies on it

1 = a(-1)^2 + 2

1 = a + 2

a = -1

new equation: y = -x^2 + 2

Notice that because of the position of the new point (1,-1) the value of a turned out be negative, which we expected, since it opens downwards

- Precalculus -
**Melinda**, Sunday, December 11, 2011 at 2:02pm
Thank you Reiny!!!!!!!

## Answer this Question

## Related Questions

- precalculus - How do I find the vertical/horizontal compression/stretch? For the...
- Precalculus - Can someone help me with this question? I got the transformation ...
- math - could someone help me please. State the amplitude and the range of the ...
- pre - CALCULUS - Begin by graphing the standard absolute value function f(x...
- pre - CALCULUS - Begin by graphing the standard absolute value function f(x...
- College Algebra - 1.The graph of y = - 1/2 |x - 5| - 3 can be obtained from the ...
- college algebra - Graph the following function using transformations. Be sure ...
- college algebra - Question 638522: Graph the following function using ...
- Math - The graph of any quadratic function can be drawn from the vertex form of...
- math - Describe the sequence and types of transformations required to transform...

More Related Questions