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Lisa is a software saleswoman. Let \( y \) represent her total pay (in dollars). Let \( x \) represent the number of copies of History is Fun she sells. Suppose that \( x \) and \( y \) are related by the equation \( 2400+90 x=y \).
Answer the questions below.
Note that a change can be an increase or a decrease.
For an increase, use a positive number. For a decrease, use a negative number.
What is the change in Lisa's total pay for each copy of History is Fun she sells?
\[
\$
\]
What is Lisa's total pay if she doesn't sell any copies of History is Fun?
\[
\$[
\]
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5/21/2025