Page 19 - Calculus Demystified

6
y CHAPTER 1 Basics
Q
4 R

1
1 4 x

S
P

Fig. 1.7

EXAMPLE 1.5
Give the coordinatesof the points X, Y, Z, W exhibited in Fig. 1.8.

y

Z

Y

x

X

W

Fig. 1.8

SOLUTION
The point X is 1 unit to the right of the y-axis and 3 units below the x-axis.
Therefore its coordinates are (1, −3).
The point Y is 2 units to the left of the y-axis and 1 unit above the x-axis.
Therefore its coordinates are (−2, 1).