Answer:
Leading coefficient -1 and Degree 6
Explanation:
Leading coefficients mean the number associated with the variable that has the highest degree in your question
![Y=7x^2-x^6+3](https://img.qammunity.org/2021/formulas/mathematics/high-school/lxjcpq6rvc7lgbofga52lo8q3hgw1wb1gk.png)
The highest degree is 6 and the leading coefficient would the number associated with x^6 which is -1 so the last option is correct