When the sign is < or >, you use an open circle -> o
When the sign is ≤ or ≥ (less/greater than or equal to), you use a closed circle.
I don't know what variable your using like n in Question 5, so I'm just gonna use x
1. There is an open circle at 2, and the arrow is point to the right, where the numbers are increasing, so your inequality is:
x > 2 [x is a number greater than 2]
2. There is a closed circle on 3, and the arrow is pointing to the left, where the numbers are decreasing, so:
x ≤ 3 [x is any number less than or equal to 3]
3. x < 4 [x is a number less than 4]
4. x ≥ 5 [x is greater than or equal to 5]
5. To solve this, you need to isolate the variable n
3n - 10 ≥ 2 Add 10 on both sides
3n ≥ 12 Divide 3 on both sides to get n by itself
n ≥ 4 [n is a number greater than or equal to 4]
The graph should have a closed circle on 4, and the arrow pointing to the right