Tell whether each relationship is a function.

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Me because some of question i don’t understand

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)

Identify the parent function that can be used to graph the function f(x)=3(x-9)2