SOLUTION: How do i solve this? I have tried many different ways, asked tons of people. And no one can figure it out. Find the values for a and k in the function {{ y=ax^2+k}} that conta

Question 225879: How do i solve this?
I have tried many different ways, asked tons of people. And no one can figure it out.
Find the values for a and k in the function {{ y=ax^2+k}} that contains the points (2,0) and (4,-6).
Thank you i would really appreciate it.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the given equation.

Plug in and from the given point (2,0)

Square 2 to get 4.

Subtract 4a from both sides.

So

-----------------

Go back to the given equation.

Plug in and from the given point (4,-6)

Square 4 to get 16.

Plug in

From here, solve for 'a'. Once you have the value of 'a', plug it into to find 'k'.

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