Question: Jade is twice as old as Sara. If Sara is $y$ years old, which expression represents Jade’s age? $y^2$ 2$y$ $y+2$ $\frac{y}{2}$
1. **State the problem:** Jade's age is twice Sara's age. Sara's age is given as $y$ years.
2. **Identify the formula:** If one quantity is twice another, the first quantity equals $2$ times the second.
3. **Apply the formula:** Jade's age = $2 \times y = 2y$.
4. **Check other options:**
- $y^2$ means Sara's age squared, which is not twice.
- $y+2$ means Sara's age plus 2, not twice.
- $\frac{y}{2}$ means half Sara's age, which is incorrect.
5. **Final answer:** The expression representing Jade's age is $2y$.