Julieta is ordering a taxi from an online taxi service. She has to pay a flat charge just
to order the taxi, and then has to pay per mile, depending on how far she travels. She
wrote an equation to represent her total cost, y = 2.8x + 2.5, where y represents
the total cost in dollars and cents, and a represents the number of miles she travels.
What is the meaning of the y-value when x = 1?
