Suppose You Produce 10 Bikes a Day for a Total

Multiple Choice

Suppose you produce 10 bikes a day for a total cost of $1000. Total costs increase to $1100 when you produce 15 bikes. Finally, total costs increase to $1300 if you make 20 bikes. A graph showing the relationship between total costs and the number of bikes produced would be

A) a negatively-sloped line that becomes flatter.
B) a negatively-sloped line that becomes steeper.
C) a positively-sloped line that becomes flatter.
D) a positively-sloped line that becomes steeper.