Page 52 - Calculus Demystified
P. 52
CHAPTER 1
Basics
Fig. 1.44 39
SOLUTION
The sketch in Fig. 1.45 is obtained by plotting points. This curve is not the
graph of a function.
Fig. 1.45
A curve that is the plot of an equation but which is not necessarily the graph
of a function is sometimes called the locus of the equation. When the curve is
the graph of a function we usually emphasize this fact by writing the equation
in the form y = f(x).
2
You Try It: Sketch the locus x = y + y.
