the answer is A) domain: (-infinity ,infinity)
Domain refers to the x value that can be imputed into this function and this seems like a linear function in which all real numbers will be valid. The range is about the range y-value that can be as an output of the function and with a linear function, the output could go from an extremely small negative to an extremely big positive number (the shape of the function shows that it continues going up and continuing going down at the different side). Basically, both x and y r going up and down on different sides.