25 points The line of best fit for a set of data is y = 0.39x + 45, where y represents total cost of a utility bill and x represents hours of usage. Using this linear model, what does the slope of the line represent? A. The flat fee is $45 for a utility bill. B. A utility bill will cost $45.39 each month. C. The cost for each hour of usage is $45. D. The cost for each hour of usage is $0.39.
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If you see the equation y = 0.39x + 45, it is of the form y = mx + c
where m is the slope i.e. 0.39 here and 45 is the constant c.
So 0.39x is the cost of of utility bill of x hrs of usage and 45 is the fixed cost of usage.
therefore, option D is correct i.e. 1 hr usage cost is 0.39(1) which is 0.39.
where m is the slope i.e. 0.39 here and 45 is the constant c.
So 0.39x is the cost of of utility bill of x hrs of usage and 45 is the fixed cost of usage.
therefore, option D is correct i.e. 1 hr usage cost is 0.39(1) which is 0.39.
bluecoatninetyjr:
thank you so much
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