QuestionDetermine if the following equations express $y$ as a function of $x$:
1. $x^{2}+y^{2}=25 \quad[\text { Select }]$
2. $2 x+3 y=10 \quad[\text { Select }]$
3. $x=y^{2}-25 \quad[\text { Select }]$

Studdy Solution
Again, we have a positive and a negative solution for y. This means that for a given x, there are two possible values of y. Therefore, y is not a function of x in this relation.
So, the answer is- $x^{2}+y^{2}=25$ - y is not a function of x- $2x +3y =10$ - y is a function of x- $x = y^{2} -25$ - y is not a function of x