• metal, metal, metal, plastic, plastic, metal, plastic, plastic, plastic, plastic .
a. Estimate the proportion of all students that prefer to use a metal pen. Make your thinking visible.

The estimate of the proportion of all students that prefer to use a metal pen is 0.4.

Step-by-step explanation:

The estimate of the proportion is the sample proportion.

In the sample:

10 students

4 use a metal pen. So

The estimate of the proportion of all students that prefer to use a metal pen is 0.4.

the correct answer is b.

this is because an open circle means < or > & since the line goes left it is < -3.

the next one has a filled circle so it can only be ≥ or ≤ and since the line goes right from 1 it is ≥ 1

hope that