In this case, you'll need to apply the chain rule, first taking the derivative of the tan function, and multiplying by the derivative of 3x:
y = tan(3x)
∴ dy/dx = 3sec2(3x)
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No. Only a linear function has a constant rate of change.No. Only a linear function has a constant rate of change.No. Only a linear function has a constant rate of change.No. Only a linear function has a constant rate of change.
Which statement describes the rate of change of the following function?f(x) = -6x - 9
You can determine if a rate of change is constant, by taking the instantaneous rate of change at multiple points - if they are all equal to each other, it can be assumed that the rate of change is constant. Alternatively, you can differentiate the function (if there is an associated function) - if this comes to a constant i.e. a number, then the rate of change is constant.
The slope of a linear function is also a measure of how fast the function is increasing or decreasing. The only difference is that the slope of a straight line remains the same throughout the domain of the line.