Calculus
# Differentiability

Sally drew the line $y=2x+3$ on the board. What is the slope of this line?

What is the slope of the line tangent to the curve $y = \ln x + 20x$ at $x = \frac{1}{7}$ ?

What is the slope of the tangent line of the curve $f(x) = x^2 + 2013$ at $x = 29$?