Find an equation of the vertical line that passes through (x, y) = (9,5)

I've never been good at math he told he loves but he keeps cheating on me, so it ain't adding up sis

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m