Final answer:
The correct function to model this situation is y = x + 3.
Step-by-step explanation:
The correct function to model this situation is y = x + 3. This function represents a linear relationship between the independent variable (x) and the dependent variable (y), where the value of y is equal to the value of x plus 3. For example, if x = 2, then y = 2 + 3 = 5. The function can be graphed as a straight line with a slope of 1 and a y-intercept of 3.