Equation for y to obtain an equation that represents circle

[Niaboc67]

Homework Statement

The equation that is first listed is: 2x^2 + 2y^2 = 7

Homework Equations

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The Attempt at a Solution

It's redefing the bottom portion therefore I think it's y=0,-2 because that is the range?

 

[phinds]

The Attempt at a Solution

It's redefing the bottom portion therefore I think it's y=0,-2 because that is the range?

I do not get how you think that is a solution. The solution is an equation in the form of y = f(x) such that it is represented by the graph shown (the lower portion of the circle. This is trivial.

 

[BvU]

Is there something known about x that you forgot to tell us ?

 

[RUber]

If you use some algebra to solve the circle equation for y, you should have a $\pm$ symbol in front of the x part. You want to either choose + or - based on what the plot shows.