Question

Translate into an equation: y varies jointly with b and c.
Choose one answer.
a. y = bc/k
b. y = kb/c
c. y = k/bc
d. y = kbc

Answer 1

y=kbc d

Answer 2

a

Answer 3

d

Answer 4

d. y = kbc

Answer 5

a and d are the same if k is a constant

Answer 6

the constant is never the denominator
y=kx directly
y=k/x or xy=k is inverse

Answer 7

what jzile says is true though
a=d

Answer 8

peaceout:this is this same as your last question....referr to that for the answer

Answer 9

i will give you an example of why a and d are the same say i ask you to find k of y=kbc
if b=2 c=3 and y=54, then you have:
54=k(2)(3)=> k=9
so you have y=9bc

now say i give you the same b and c, b=2, b=3 and same y,y=54 and find k if y=bc/k
54=(2)(3)/k
54k=6
so k=6/54=1/9

so we have y=bc/(1/9)=9bc

the equations are the same

Answer 10

but if the question asks for the constant of variation then 9 and 1/9 are different answers

Answer 11

no but 9 and 1/(1/9) are the same

Answer 12

right but if k is the denominator k is not 1/(1/9) it is just 1/9 and some algebra books just ask for the value of k. I agree with you that a constant is just a constant but with Algebra 1 or even algebra 2, it may be considered an incorrect answer.