13 REPRESENT By graphic reading]
In each case, the line d represents a function f.
d
b.
d
C.
2
2
1
1. Give the sign of f(-3) and the sign of f(4).
2. Give the sign of f(x) according to the values of x.
3. Draw up the table of signs of f.

13 REPRESENT By graphic reading In each case the line d represents a function f d b d C 2 2 1 1 Give the sign of f3 and the sign of f4 2 Give the sign of fx acc class=