Context: Linear function $f$ passing through $(0, -7)$ and $(6, -6)$.

Answer: $\dfrac{1}{6}$

Why: Slope $= \dfrac{-6 - (-7)}{6 - 0} = \dfrac{1}{6}$.

Traps:

• B ($-7$): The y-intercept, not the slope.
• C ($-\dfrac{1}{6}$): Wrong sign — the line goes slightly upward.
• D ($7$): Absolute value of the y-intercept.