Ahhh please help this makes zero sense

The parabola opens: y=√x-4 (principal square root) up down right left

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is . reset next

What are two numbers that add up to -9 and multiply to -10 best answer gets branliest and 100 extra points