The length of a rectangle is 9 units more than its width. Use x to represent the width. Then write an algebraic expression that
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y = a(1 + r)ˣ
a = 15 "<em>initial" means what you started with on the first day</em>
r = 6 <em>the rate it increased is the slope (</em>
y = 15(1 + 6)ˣ
Answer: y = 15(7)ˣ