Alternative
we have
we know that
If a point is a solution of the inequality
then
the point must be satisfy the inequality
we're going to verify all the points.
<u>case A)</u> point
Substitute the value of x and the value of y in the inequality
------> is true
therefore
The point is a solution of the inequality
<u>case B)</u> point
Substitute the value of x and the value of y in the inequality
------> is true
therefore
The point is a solution of the inequality
<u>case C)</u> point
Substitute the value of x and the value of y in the inequality
------> is true
therefore
The point is a solution of the inequality
<u>case D)</u> point
Substitute the value of x and the value of y in the inequality
------> is not true
therefore
The point is not a solution of the inequality
Alternative
we have
we know that
If a point is a solution of the inequality
then
the point must be satisfy the inequality
we're going to verify all the points.
<u>case A)</u> point
Substitute the value of x and the value of y in the inequality
------> is not true
therefore
The point is not a solution of the inequality
<u>case B)</u> point
Substitute the value of x and the value of y in the inequality
------> is not true
therefore
The point is not a solution of the inequality
<u>case C)</u> point
Substitute the value of x and the value of y in the inequality
------> is true
therefore
The point is a solution of the inequality
<u>case D)</u> point
Substitute the value of x and the value of y in the inequality
------> is not true
therefore
The point is not a solution of the inequality