Peter has been working for the past few weeks from 1 pm to 9 pm each day. Each day , Peter has tracked the hour and the number of hot dog sales for each hour. Look at this data set for Saturday (1,7);

Peter has been working for the past few weeks from 1 pm to 9 pm each day. Each day , Peter has tracked the hour and the number of hot dog sales for each hour. Look at this data set for Saturday (1,7);(2,12);(3,18);(4,20),(5,22) ; (6,25);(7,30) ; (8,32);(9,35) To establish the relationship between the time of day and the number of hot dogs sold , Peter will need to put the data into the formula y = mx + b . m- What is the independent variable or input (x) ?