Make the equation of a straight line passing through two points A (2; 25) B (-1; 4)
| December 19, 2020 | education
y = kx + b, then substituting the data solved by the system of equations, we find k and b
25 = 2k + b
4 = -k + b. »B = 4 + k
25 = 2k + 4 + k
25 = 3k + 4
3k = 21
K = 7 “b = 4 + 7 = 11
We get the equation of the straight line:
y = 7x + 11
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