Cynthia goes over to her grandma’s house one Saturday to help her clean. Cynthia cleans her grandma’s house for 1 hour and her grandma pays her $20. The following Saturday, Cynthia goes over to her grandma’s house again to help her clean. She cleans for 1 hour and her grandma gives her $15. Is this a function? Justify your answer using one complete sentence. Remember to be incorporating mathematical language into your response.