Answer:
The first graph is the graph of the solution set of the inequality
x ≥ 9
Explanation:
If multiply or divide the two sides of the inequality by a negative number, then we must reverse the sign of the inequality
Example:
2 < 3, when we divide both sides by -1, then it will be -2 > -3
Let us solve the question
∵
x ≥ 9
→ To find x divide both sides by
∵
is a negative number
→ From the rule above
∴ Reverse the sign of inequality
∴ x ≤ -15
∵ We have an equal sign with the sign of inequality
∴ The vertex of the arrow should be bold
∵ The sign of inequality is smaller than
∴ The arrow must be pointed to the left ⇒ (negative direction)
∵ x ≤ -15
∴ The arrow represents it has a bold starting point at -15 and pointed
to the left
∴ The answer is the first graph