What is the vertex of the parabola in the graph?

Sam makes his sales calls according to a pattern. he travels either north or south depending on the calendar. some of his past trips were as follows: on february 17, april 24, june 10, september 19, and november 3 he drove north. on february 28, may 25, august 22, november 20, and december 18, he drove south. describe sams' pattern. in which direction will sam drive on oct4 and oct 24?

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

Math it's appreciated. (picture provided)