is my answer correct??

Given that D(x) = 2x, select all of the following that are true statements.

D(x) is a function.

Question

is my answer correct??

Given that D(x) = 2x, select all of the following that are true statements.

D(x) is a function. <<<
x is the dependent variable.
D(6) = 3<<<
D(x) is a direct variation. <<
D(x) is a rule for the set of points (5, 10), (6, 12) and (-2, -4).

shamil98 · Answer

D(6) is wrong
D(6)  = 12
y = 2x
it is an indirect variation, not direct.
the last one is correct too.

shamil98 · Answer

oh my bad, it is a direct variation*

shamil98 · Answer

A - right
b - wrong
 C - wrong
d - right
e - right