Which of the following regressions represents the strongest positive linear relationship between x and y?

Asalesperson earns $320 per week plus 8% of her weekly sales. the expression representing her earnings is 320 + 0.08x. which of the following describes the sales necessary for the salesperson to earn at least $1000 in the one week?

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If g^-1(x) is the inverse of g (x) which statement must be true