if f(x) varies directly with x and f(x) = 4 when x = 12, then what is the value of f(x) when x = 60?

20
180
5
300

what is the domain of the function: {(2, 1); (4, 2); (6, 3); (8, 4)}?

{6, 8}
{1, 2, 3, 4}
{1, 2, 3, 4, 6, 8}
{2, 4, 6, 8}
what is the turning point of the graph of f(x) = |2x| – 3 ?

(–2, –3)
(0, 0)
(0, –3)
(2, 0)

150.6

all i did was i multiplied 5.02 by 30

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.

yes i do see that. i say this because i am doing my very best in high school so i can get a scholarship and credits.