Sign conditions on a and b when ax + by + c = 0 is a normal to xy = 1

1. A.
   $\alpha>0,b>0$
2. B.
   $\alpha>0,b<0$
3. C.
   $\alpha<0,b<0$
4. D.
   $\alpha=0,b=0$

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1. A.
   $A > 0, B > 0$ or $A < 0, B < 0$
2. B.
   $A > 0, B < 0$
3. C.
   $A < 0, B > 0$
4. D.
   $C = 0$

Tap an option to check your answer.

1. A.
   $a > 0, b < 0$
2. B.
   $a < 0, b < 0$
3. C.
   $a > 0, b = 0$
4. D.
   $a > 0, b > 0$

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