write the multiplication equation this number line models.

Explanation:

Step1: Identify the jump - size and number of jumps

The jump - size is 8 (e.g., from 0 to - 8, - 8 to - 16 etc.) and there are 8 jumps in the negative direction.

Step2: Write the multiplication equation

The multiplication equation for repeated addition (or subtraction in this case) is $8\times(- 8)=-64$.

Answer:

$8\times(-8)=-64$