Which statement correctly explains whether the equation y = x2 – 2 represents a function? It is a function because there is only one x-value for each y-value.
It is not a function because there are no y-values less than – 2.
It is not a function because y = 2 when z = 2 or x = -2.
O It is a function because there is only one y-value for each 2-value.

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.