For the given slope of line l1, (a) find the slope of line a l2 parallel to l1, and (b) find the slope of a line l3 perpendicular to l1.m = 4
A. (a) 4; (b) - 
B. (a) 
; (b) - 4
C. (a) 12; (b) - 
D. (a) - 4; (b) - 
Answer: A
Mathematics
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