sat suite question viewer
Algebra
/ Linear equations in two variables
Difficulty: Easy
Line is shown in the xy-plane. Line (not shown) is parallel to line . What is the slope of line ?
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Explanation
The correct answer is . It's given that line is parallel to line . It follows that the slope of line is equal to the slope of line . Given two points on a line in the xy-plane, and , the slope of the line can be calculated as . In the xy-plane shown, the points and are on line . It follows that the slope of line is , or . Since the slope of line is equal to the slope of line , the slope of line is also .