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The slope of the tangent to $y = x^2$ at $x = 3$ is:
A$6$, since $dy/dx = 2x = 6$ at $x = 3$ on chart
B$9$, equal to the y-coordinate at $x = 3$ on chart
C$3$, equal to the x-coordinate alone on chart here
D$2$, the coefficient in the derivative on the chart
Answer & Solution
Correct answer: A. $6$, since $dy/dx = 2x = 6$ at $x = 3$ on chart
$y' = 2x$; at $x = 3$, slope is $6$.
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