Riley! Something is bothering me. {{CMD_7}} What is it? {{CMD_8}} I have broken calculus. {{CMD_9}} How? {{CMD_10}} Check this out, we know that: {{MATH_11}} {{CMD_12}} Right. {{CMD_13}} But I also know that the derivative {{CMD_14}}is{{CMD_15}} the slope of the tangent line at a point. {{CMD_16}} Right! {{CMD_17}} But check out this plot of {{MATH_18}} that's zoomed in around zero: {{CMD_19}} {{ENV_20}} {{CMD_21}} {{CMD_22}} Ok{{CMD_23}} {{CMD_24}} Well, {{MATH_25}}, but the slope of this line is totally {{CMD_26}}not one{{CMD_27}}! What's going on here? {{CMD_28}}