Final answer:
The relationship between x and y needs to be established to find y when x is 42. Without the specific equation or additional data points, it is not possible to accurately determine y from the given information.
Step-by-step explanation:
To solve for y when x equals 42, we need to determine the relationship between x and y first. Given the point (x=8, y=20), we can infer a linear proportion since no other information is provided. When x doubles, we would expect y to double if the relationship is directly proportional. However, without a specific equation or further data points, we can't confirm this proportionality or calculate an exact value for y.
Therefore, without additional information or context, the question cannot be answered conclusively. We need either more data points or the specific linear equation relating x and y. Appropriately, the options provided (A. 100, B. 105, C. 110, D. 120) cannot be determined to be correct without this information.