Linear function

What is the equation of linear function passing through points:

a) A (0,3), B (3,0)
b) A (-2,-6), B (3,4)

Correct result:

a =  0

Solution:


3 = q•0+w
0 = q•3+w

w = 3
3q+w = 0

q = -1
w = 3

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