Question

Which is the independent variable in the function y = 8x^2 - 3 if y = f(x)?



x


y<---my answer


neither x nor y


both x and y
Determine the domain of the function f(x) = 2x - 4 when the range is {0, 12, 20}.



{2, 8, 12}


{0, 12, 20}


{4, 16, 24}


none of these

Answer 1

In this case, the dependent variable is y because y depends on the values of x (also because it is a function of x).

For the second part, plug in those values for f(x) and solve for x :) Range = y values, domain = x values.

Answer 2

think of its like this on a cartesian plane for you 1st question

Answer 3

easy way to determine which is the dependent variable

Answer 4

yes you are correct therefore you know that y is the dependent variable

Answer 5

correct which means x is the independent variable?

Answer 6

yes

Answer 7

Yes :)

Answer 8

ok ty