BARDZO PROSZĘ O POMOC!! Wyznacz równanie prostej przechodzącej przez dwa dane punkty A i B. A = (-7 ; 5) B= (-4 ; -1)
y=ax+b
-7a+b=5
-4a+b=-1
-3a=6
a=-2
-4*(-2)+B=-1
8+b=-1
b=-9
y=-2x-9
{-7a+b=5
{-4a+b=-1
b=5+7a
-4a+5+7a=-1
3a=-6
b=5+7*(-2)
b=5-14
wiec:
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y=ax+b
-7a+b=5
-4a+b=-1
-3a=6
a=-2
-4*(-2)+B=-1
8+b=-1
b=-9
y=-2x-9
{-7a+b=5
{-4a+b=-1
b=5+7a
-4a+5+7a=-1
3a=-6
a=-2
b=5+7a
b=5+7*(-2)
b=5-14
b=-9
wiec:
y=-2x-9