Keisha is a software saleswoman. let y represent her total pay (in dollars). let x represent the number of copies of english is fun she sells. suppose that x and y are related by equation 90x+2500=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 keisha's total pay for each copy of english is fun she sells?
what is kiesha's total pay if she doesn't sell any copies of english is fun?