1. What is the range of the function: {(1, 3); (3, 5); (5, 7); (7, 9)}?

(Points : 4)

{1, 3, 5, 7}

{1, 3, 5, 7, 9}

{1, 9}

{3, 5, 7, 9}



Question 4.4. 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?

(Points : 4)

5

20

180

300


What is the turning point of the graph of f(x) = |4x| + 2 ?

(Points : 4)

(0, 0)

(–4, 2)

–(2, 0)

(0, 2)