Find the Average Rate of Change Illustrated in the Graph $\$ 1.90$

question 167

Multiple Choice

Find the average rate of change illustrated in the graph.
-Regrind, Inc. regrinds used typewriter platens. The variable cost to regrind each platen is $\$ 1.90$ . The total cost to regrind 100 platens is $\$ 300$ . Find the linear cost function to regrind platens. If reground platens sell for $\$ 8.70$ each, how many must be reground and sold to break even?

• A) \(C ( x ) = 1.90 x + 110 ; 11\) platens
• B) \(C ( x ) = 1.90 x + 110 ; 17\) platens
• C) \(C ( x ) = 1.90 x + 300 ; 29\) platens
• D) \(C ( x ) = 1.90 x + 300 ; 45\) platens

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