Final answer:
Without a provided number line, we can infer that to find the number Genesis added to 8, one would count the steps she took to the right from 8 on a number line. The addition equation representing the model is 8 + x = y, where x is the unknown number added, and y is the resulting position on the number line.
Step-by-step explanation:
To solve this mathematics problem, we will use the number line to model addition. Unfortunately, the number line was not provided, but let's assume Genesis starts at the number 8 on a number line. From there, she moves a certain number of steps to the right to the final number. For instance, if she lands on 10, then she has added 2 to the original number 8.
The basic principle in working with addition is to start with the first number and then count forward as many steps as the second number indicates. When working with whole numbers, attention should be paid to the sequence on the number line and moving the correct number of steps in the positive direction for addition.
The addition equation that represents this model would be in the form of 8 + x = y, where x is the number she added to 8, and y is the final position on the number line.