2003 AMC 12B Problems/Problem 6
Since is a linear function with slope ,
\[\frac{12}{\6 - 2} = m\] (Error compiling LaTeX. Unknown error_msg)
$$ (Error compiling LaTeX. Unknown error_msg)\frac{f(12) - f(2) = m\Delta x = 4(12 - 2) = 30 \Rightarrow \text {(D)}