$\"\"$

The equation is $\"\"$ .

Solve by algebraically.

$\"\"$ (Subtract 3 from each side)

$\"\"$ (Simplify)

$\"\"$ (Divide each side by 9)

$\"\"$ (Divide: $\"\"$ )

The solution is $\"\"$ . $\"\"$

Solve by graphing.

The equation is $\"\"$ .

The related function is $\"\"$ .

To graph the function make a table

Draw a table \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
\
x
\ \
f(x) = 9x + 3
\ \
f(x)
\ \
(x, f(x))
\
\
1
\ \
= 9(1) + 3
\ \
12
\ \
(1, 12)
\
\
2
\ \
= 9(2) + 3
\ \
21
\ \
(2, 21)
\
\

$\"\"$

Use these ordered pairs to graph the equation.

1. Draw a coordinate plane.

2. Plot the points.

3. Draw a line through these points.

$\"The$

The graph intersects the x-axis at $\"\"$ , hence the solution is $\"\"$ . $\"\"$

The root of the equation $\"\"$ is $\"\"$ .

\ x \	\ f(x) = 9x + 3 \	\ f(x) \	\ (x, f(x)) \
\ 1 \	\ = 9(1) + 3 \	\ 12 \	\ (1, 12) \
\ 2 \	\ = 9(2) + 3 \	\ 21 \	\ (2, 21) \