Final answer:
To graph the inequality 42≤−7x on a number line, use a closed circle at -6 and the arrow goes to the left.
Step-by-step explanation:
To graph the inequality 42≤−7x on a number line, we need to determine whether to use an open circle or a closed circle and whether the arrow should go to the left or the right.
First, let's solve the inequality for x: 42≤−7x
Divide both sides of the inequality by -7, remembering to reverse the inequality sign since we are dividing by a negative number: x ≤ -6
Since the inequality symbol is ≤ (less than or equal to), we use a closed circle at -6 and the arrow goes to the left.