Easy Algebra Step-by-Step

204 Easy Algebra Step-by-Step

3. Find the domain of each of the functions.
   a. y=f(x) = 5 x − 7

b. ygg()xx 23 xx− + 4

c. y x

x

=

−

91 x+

5

d. y

x

x

=

−

25 x +

4

2

2

4. If fx()x = 52 xxx+ − 3 , fi nd the indicated value.
   a. f(2)
   b. f(−1)
   c. f(6)
   d. f(−3)


5. Which of the graphs is the graph of a function?

a. b. c.

y

x

2

–2

y

x

2

–2

y

x

6. Write the equation for the functional relationship between x and y.

x 2 3 4 5

y 9131721