You had 20 shirts in your closet before you went shopping. Every week. you went to the mail and bought 3 times as many new shirts. Write an equation for the exponential equation, and determine the key features of this function.

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answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

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step-by-step explanation: