The equations below represent the costs to print brochures at three different printers. For which equation does the point (20,60) lie on the graph?
a. C=$15 + $2.50N
b. C= $50+ $1.75N
c. C= $30+ $1.50N
Pls help I need the answer now

Which statement is true about the local minimum of the graphed function? over the interval[-4,-2], the local minimum is 0. over the interval [-2,-1] , the local minimum is 25. over the interval [-1,4], the local minimum is 0. over the interval [4,7], the local minimum is -7