A student, who is studying walking rates, enters the rule y=40+2x into the calculator and produces this graph. He has highlighted one point n the...

A student, who is studying walking rates, enters the rule y=40+2x into the calculator and produces this graph. He has highlighted one point n the graph (88,216).a. What question could the student be trying to answer by using this graph?b. Write a question for part (a) as an equation that could be used to find the answer.