1. DELIVERY CHARGES The cost of sending an overnight package from New York to Atlanta is $22.65 for a package weighing up to but not including 1 pound and $3.70 for each additional pound or portion of...

1. DELIVERY CHARGES The cost of sending an overnight package from New York to Atlanta is $22.65 for a package weighing up to but not including 1 pound and $3.70 for each additional pound or portion of a pound.

(a) Use the greatest integer function to create a model for the cost of overnight delivery of a package weighing pounds,

(b) Sketch the graph of the function.