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Consider the following statements about the linear dependence of the real valued function $y_{1}=1,y_{2}=x$ and $y_{3}=x^{2}$ over the field of real numbers.

- $y_{1},y_{2}$ and $y_{3} $ are linearly independent on $-1\leq x\leq 0$
- $y_{1},y_{2}$ and $y_{3} $ are linearly dependent on $0\leq x\leq 1$
- $y_{1},y_{2}$ and $y_{3} $ are linearly independent on $0\leq x\leq 1$
- $y_{1},y_{2}$ and $y_{3} $ are linearly dependent on $-1\leq x\leq 0$

Which one among the following is correct?

- Both I and II are true
- Both I and III are true
- Both II and IV are true
- Both III and IV are true