AIR MATH

Math Question

Liana wants to estimate the amount of money she pays, in dollars, when using \( k \) kilowatt hours of electricity. She looks at her previous power bills and finds that she paid \( \$ 45.83 \) for 550 kilowatt hours of electricity in November and \( \$ 93.57 \) for 1250 kilowatt hours of electricity in September. She pays the same amount for every kilowatt hour of electricity. Which function \( C(k) \) models the amount Liana will pay for using \( k \) kilowatt hours of electricity in one month? (A) \( C(k)=0.0682 k+8.32 \) (B) \( C(k)=0.4360 k-451.43 \) (c) \( C(k)=2.2937 k-1215.71 \) (D) \( C(k)=14.6628 k-122.00 \)

Solution

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