The graph of the inequality is the shaded region and boundary of the inequality is
. To graph the boundary, find the x-intercept and y-intercept of the line.
First find the y-intercept.
\The y-intercept is the value of y, when .
(Substitute
in original equation)
(Apply zero product property:
)
The y-intercept is 5, so the graph intersects the y-axis at (0,
5).
Next find the x-intercept.
\The x-intercept is the value of x, when .
(Substitute
in original equation)
Apply multiplicaction property of equality: If a = b than .
(Multiply each side by 2)
(Cancel common terms) \ \
(Multiply:
)
Apply addition property of equality: If a = b than a + c = b + c.
\ (Add 10 to each side)
(Apply Additive inverse property: – 10 + 10 = 0)
The x-intercept is 10, so the graph intersects the x-axis at (10, 0).
To draw inequality follow the steps.
1. Draw a coordinate plane.
\2. Plot the points.
\3. Since inequality symbol is
, the boundary is included in the solution set. Graph the boundary of the inequality
with a solid line.
4. To determine which half-plane to be shaded use a test point in either half-plane. A simple choice is (0, 0).
\Substitute and y = 0 in original inequality .
The statement is true.
\4. Since the statement is true, shade the region that contains point (0, 0).
\
Inequality graph is