line “r” is perpendicular to the line 3y = 6x + 9. Find the gradient of the line “r”.
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Answer: -1/2
Step-by-step explanation:
Y=mx+c
3y = 6x + 9
Y=2x+3
M=2
M1 * M2 = -1
M1 * 2 = -1
M1 = -1/2
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