Linear function is represented by the equation f(x) = mx + b
Where, m = rate of change and b = Initial quantity
Function representing the total amount spent will be P(x) = 15x + 4000
Points to focus upon,
Let the number of guests over 200 are 'x'.
Therefore, amount of money spent on 'x' guests = $15x
And the number of guests in the party = 200 + x
Total amount spent on (200 + x) guests = $(4000 + 15x)
If P(x) represents the total amount spent, function for the total expenditure will be,
P(x) = (4000 + 15x)
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