Please help idk how to do this

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

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Nine more than four times a number is the same as one less than twice the number. find the number?