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Let f(x)=22−x2f(x)=22-x2 The slope of the tangent line to the graph of f(x) at the point...

Let f(x)=22−x2f(x)=22-x2
The slope of the tangent line to the graph of f(x) at the point (−4,6) is    .
The equation of the tangent line to the graph of f(x) at (-4,6) is y=mx+b for
m=
and
b=  
Hint: the slope is given by the derivative at x=−4

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