Which equation represents the graph?

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?

The graph shown is the graph of which function?