Multiple choice lines question. Please help

Considering their slopes, these two lines, Line 1 and Line 2, are perpendicular.
The slope, given by change in y divided by change in x, determines if the lines are parallel, perpendicular, or neither, as follows:
In this problem, the slopes are given as follows:
The multiplication is given by:
3 x -1/3 = -1.
Hence they are perpendicular.
More can be learned about the slope of a line at brainly.com/question/12207360
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