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What is implicit differentiation?
A method to find derivatives when $y$ is not explicitly defined in terms of $x$.
What is $\frac{dy}{dx}$ in implicit differentiation?
Represents the derivative of $y$ with respect to $x$, found when $y$ is not explicitly defined.
What is the general notation when differentiating both sides of an equation with respect to x?
$\frac{d}{dx}(\text{equation}) = \frac{d}{dx}(\text{other side})$
What is the point-slope form of a tangent line equation?
$y - y_1 = m(x - x_1)$, where $m$ is the slope and $(x_1, y_1)$ is a point on the line.
State the product rule.
$\frac{d}{dx}(uv) = u\frac{dv}{dx} + v\frac{du}{dx}$
What does $\frac{dy}{dx} = 0$ indicate on a graph?
A horizontal tangent line, indicating a local maximum or minimum (or saddle point).
What does the sign of $\frac{dy}{dx}$ tell you?
Positive: the function is increasing. Negative: the function is decreasing.