Sofie makes and sells scarves. Her profit depends on what price she charges for a scarf. She writes the expression (x−5)(50−2x) to represent her profit based on the price per scarf, x.

Enter Sofie's average change in profit for two different sections of the graph.

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CLEAR CHECK
What is Sofie's average change in profit from x=5 to x=15?

For every $1 increase in the price per scarf, Sofie's profit changes by an average of $
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What is Sofie's average change in profit from x=15 to x=25?

For every $1 increase in the price per scarf, Sofie's profit changes by an average of $