y = ax + b
a)
4 = 2*3+b
-b = 2
b = -2
y = 2x-2
b)
4 = -3+b
b = 7
y = -x+7
c)
4 = 3/2 + b
5/2 = b
y = 1/2x + 5/2
a=2; (3,4)
y=ax+b
4=2*3+b
4=6+b
-2=b
y=2x-2
a=-1;(3,4)
4=-1*3+b
4=-3+b
7=b
y=-x+7
a=1/2; (3,4)
4=1/2*3+b
4=3/2+b
4-3/2=b
2 1/2=b
y=1/2x+2 1/2
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y = ax + b
a)
4 = 2*3+b
-b = 2
b = -2
y = 2x-2
b)
4 = -3+b
b = 7
y = -x+7
c)
4 = 3/2 + b
5/2 = b
y = 1/2x + 5/2
a)
a=2; (3,4)
y=ax+b
4=2*3+b
4=6+b
-2=b
y=2x-2
b)
a=-1;(3,4)
y=ax+b
4=-1*3+b
4=-3+b
7=b
y=-x+7
c)
a=1/2; (3,4)
4=1/2*3+b
4=3/2+b
4-3/2=b
2 1/2=b
y=1/2x+2 1/2