What type of slope is a vertical line

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)