Final Answer:
The best view of the line (x + y = 25) on the graphing calculator would be achieved by selecting option (d) Horizontal line.
Step-by-step explanation:
The equation (x + y = 25) can be rearranged to y = -x + 25, indicating a slope of -1. A horizontal line will be the most informative view because it captures the constant value of 25 on the y-axis, providing a clear representation of the line's position on the graph.
In a horizontal line, the y-coordinate remains constant for all points on the line, making it ideal for showcasing the specific y-intercept value of 25. Selecting a horizontal view allows for a straightforward visualization of the line's orientation, making it easier to interpret and analyze. This choice ensures that the viewer can focus on the essential features of the line without unnecessary distractions, providing a clear and accurate representation of the graph.