SOLUTION: if a varies directly as band a=16 when b=-8, what is b when a=4

Algebra ->  Algebra  -> Rational-functions -> SOLUTION: if a varies directly as band a=16 when b=-8, what is b when a=4      Log On

Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!
Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

   

Question 118330: if a varies directly as band a=16 when b=-8, what is b when a=4
Answer by stanbon(48558) About Me  (Show Source):
You can put this solution on YOUR website!
if a varies directly as b
a = kb
--------------
and a=16 when b=-8
16 = k*-8
k = -2
-----------------
what is b when a=4
EQUATION:
Since a = -2b,
4 = -2b
b = -2
==============
Cheers,
Stan H.