What graph represents this equation Y=1/2x2+2x-6

So for number 2 you need to use interval notation so the domain would be [-6,-1) and [3,positive infinity) because the domain will keep going on forever. Then the range would be (negative infinity, 4] because the y-values stop at positive 4. You use [ ] for values that are marked with the closed dot and then ( ) for open dots or infinity