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the graph represents a mechanic’s labor costs for a given number of hours of car repair.

a graph titled car repairs. the horizontal axis shows labor time (hours) numbered 0.25 to 2.5, and the vertical axis shows labor costs (dollars), numbered 25 to 250. the line remains constant at $50 dollars over 1 hour, then increases sharply. the line remains at 50 dollars from 0 to 1 hour, then move upward to end at 175 dollars at 2.5 hours.

which statement describes the relationship between labor cost and time for a car repair?

all repairs requiring 1 hour or less have the same labor cost.
labor costs the same no matter how many hours are used for a repair.
labor costs for a repair are more expensive as the number of hours increases.
there is no cost of labor for a repair requiring less than 1 hour.