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a) A(0,0)
P(1,5)
5 = a*1 + b
0 = a*0 + b
5 = a*1 + b
b = 0
5 = a + 0
b = 0
a = 5
b = 0
wzór funkcji: y = 5x
b) A(0,0)
P(-3,2)
2 = a*(-3) + b
0 = a*0 + b
2 = -3a + b
b = 0
2 = -3a + 0
b = 0
a = -²/₃
b = 0
wzór funkcji: y = -²/₃x
c) A(0,0)
P(-3,0)
0 = a*(-3) + b
0 = a*0 + b
0 = -3a + b
b = 0
0 = -3a + 0
b = 0
a = 0
b = 0
wzór funkcji: y = 0