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Unformatted text preview: Example 1 Use Figure 2 to find the slopes of the lines a, b, c , and d . Line a passes through the points (7,2) and (3,4). Line b passes through the points (2,4) and (6,2). Line c is parallel to the x-axis. Therefore, m = 0 Line d is parallel to the y-axis. Therefore, line d has an undefined slope....
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- Fall '07