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svetlana [45]
3 years ago
10

Choose the equation of the line that contains the points (1,-1) and (2,2)

Mathematics
1 answer:
natka813 [3]3 years ago
7 0
(1,-1)(2,2)
slope = (2 - (-1) / (2 - 1) = 3/1 = 3

y = mx + b
slope(m) = 3
use either of ur points...(2,2)...x = 2 and y = 2
now we sub and find b, the y int
2 = 3(2) + b
2 = 6 + b
2 - 6 = b
-4 = b

so ur equation is : y = 3x - 4
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