Final Answer:
The slope of the line containing the points P₁(7,5) and P₂(-1,5) is 0.
Step-by-step explanation:
To find the slope of a line, we use the formula:
slope = (y₂ - y₁) / (x₂ - x₁)
where (x₁, y₁) and (x₂, y₂) are two points on the line.
In this case, we have two points: P₁(7,5) and P₂(-1,5). Substituting these values into the formula for slope, we get:
slope = (5 - 5) / (7 - (-1))
slope = 0
The slope of a horizontal line is always 0, as the y-coordinate remains constant as we move along the line. In this case, both points have a y-coordinate of 5, so the line is horizontal and has a slope of 0.