Question

Is the relationship between the variables in the table a direct variation, an inverse variation, both, or neither? if it is a direct or inverse variation, write a function to model it.

x 2 5 15 20
y 20 15 2 2

a. inverse variation;y=10/x
b. neither
c. direct variation; y=x+10
d. direct variation; y=10x

Answer 1

If xy is constant, it's inverse
If x/y is constant, it's direct

Looks like (b) to me

(c) is a bogus answer in any case.

Answer 2

Thanks for the great explanation steve

Answer 3

it is B. neither

Answer 4

Is the relationship between the variables in the table a direct variation, an inverse variation, both, or neither? if it is a direct or inverse variation, write a function to model it.

x 2 5 12 20
y 30 12 5 3

a. inverse variation;y=60/x
b. neither
c. direct variation; y=2x+2
d. direct variation; y=15x

Answer 5

i think its neither