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?

5

20

180

300

5. Given the function T(z) = z – 8, find T(–2).

6

10

–10

–6

6. What is the turning point of the graph of f(x) = |3x| + 1 ?

(0, 0)

( , 0)

(0, 1)

(–3, 0)

4. 20

5. -10

6. 0,1...............................................................................................

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