Complete the equation that models is the curve of best fit for this data.

Curve of best fit: f(x) (1.35,1.89) (0.65, 1.89, 0.11, 1.35) ^x

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Cherie works in retail and her weekly salary includes commission for the amount she sells. the equation s=400+0.15c models the relation between her weekly salary, s, in dollars and the amount of her sales, c, in dollars. interpret the slope of the equation.