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It's a linear function with y-intercept = 12.
The slope-intercept form:
Let's read the coordinates of two points on the graph:
(2, 15) and (4, 18)
Substitute to the formula of a slope:
We have the equation of a line:
We need calculate the value of function for x = 1 and x = 20.
Substitute:
$12 is the "Fixed Fee", therefore the discounted entrance fee to the art museum is
The total cost is $42.00 after 20 visits.
<h3>Answer D.</h3>