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y=0.4x+3
przecięcie z OX
0=0.4x+3
0.4x=-3
x=-7.5 => (7.5 , 0)
z OY
y=0.4 * 0 + 3
y= 3 => (0, 3)
b)
y=-0,25x-2
z OX
0=-0.25x-2
-0.25x=2
x=-8 => ( -8, 0)
z OY
y=-0.25*0-2
y=-2 => (0, -2)
c)
y= -x+3
z OX
0= -x + 3
x=3 => (3, 0)
z OY
y=0 + 3
y= 3 => (0,3)
d)
y=-4
brak przecięcia z OX
z OY
x=0 => (0,-4)