Two young mathematicians think about the plots of functions.
- Devyn
- Riley, do you remember when we first starting graphing functions? Like with a ‘‘T-chart?’’
- Riley
- I remember everything.
- Devyn
- I used to get so excited to plot stuff! I would wonder: ‘‘What crazy curve would be drawn this time? What crazy picture will I see?’’
- Riley
- Then we learned about the slope-intercept form of a line. Good-old
- Devyn
- Yeah, but lines are really boring. What about polynomials? What could you tell me about just by looking at the equation?
- Riley
- Hmmmm. I’m not sure…
Very roughly speaking, what does the graph of look like?
The graph starts in the
lower left and ends in the upper right of the plane. The graph starts in the lower
right and ends in the upper left of the plane. The graph looks something like the
letter ‘‘U.’’ The graph looks something like an upside down letter ‘‘U.’’