fanta47
30.07.2019 •
Mathematics
What is the equation of the line that passes through the points (−2,1) and (4,5) in the cartesian coordinate plane?
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Ответ:
y=kx+b
We substitute coordinates of points
1=-2k+b (1)
5=4k+b (2)
We give a system of equations
Solution of this system:
(1) b=1+2k
(2) 5=4k+1+2k
6k=4
k=2/3
b=1+4/3=7/3
y=2/3x+7/3
Ответ:
The third option I think
Step-by-step explanation: