Can someone explain what 2 do for these 2 problems ?

Which graph shows a function with a range of all real numbers greater than or equal to -1

What properties allow transformation to be used as a problem solving tool

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]