1. The problem states that Nick's camera has a total memory storage of 128 GB and he uses 20 GB each month. 2. We want to write a function $y$ that describes the remaining memory after $x$ months. 3. The total memory is 128 GB, and each month 20 GB is used, so the remaining memory decreases by 20 GB per month. 4. The function can be written as: $$y = 128 - 20x$$ where: - $y$ is the remaining memory in GB, - $x$ is the number of months. 5. This is a linear function with a starting value (intercept) of 128 and a slope of -20, indicating the memory decreases by 20 GB each month. 6. For example, after 3 months, the remaining memory is: $$y = 128 - 20 \times 3 = 128 - 60 = 68$$ GB. 7. This function helps predict how much memory will be left after any number of months $x$.