Respuesta :
B. The number of hours Noel worked
The equation for a linear equation is given by:
y = mx + b;
where y is the dependent variable, x is the independent variable, m is the rate of change of y with respect to x, b is the initial value of y that is value of y when x is 0.
Given the function:
f(x) = 40x + 15
Since f(x) represent the total charges, 15 represent the fixed fee, 40 represents the charges per hour and x represents the number of hours for which Noel worked.
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