QuestionIdentify which function opens upward: $y=-2 x^{2}+x+3$ or $f(x)=0.5 x^{2}-x-1$.

Studdy Solution
Since the coefficient of $x^{2}$ in the function $f(x)=0.5 x^{2}-x-1$ is positive, this function opens upward.
So, the function that opens upward is $f(x)=0.5 x^{2}-x-1$.