Need help with a function task.

[wintry island]

17.1

I know that y = kx + b, but idk how to proceed

[tawdry rose]

just differentiate and sub 3 in

[wintry island]

And how to explain that

[steady minnow]

What do you mean by "how to explain that"?

[tawdry rose]

find dy/dx, aka f’(x), then plug in x=3. dy/dx |3 aka f’(3)

[steady minnow]

Wait quick question, do you know derivatives and calculus?

[wintry island]

Like why plug in 3

[wintry island]

Derivatives yes

[stiff crown]

If the tangent line is drawn from (3, 0), to find the slope of it, you just need to find the derivative at that point — f'(3)

[steady minnow]

Now the derivative represents the slope of function at a point. to know the slope you plug in the value of x at that point in your example it's 3

[wintry island]

Thx

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