Raphael Stevenson

Mathematics

18 March, 08:07

1. Which relation represents a function?

a] x = 1, 1, 1, 1, 1

y = 2, 3, 4, 5, 6

b] x = 1, 2, 3, 4, 5

y = 5, 4, 3, 2, 1

c] x = 1, 2, 1, 2, 1

y = 0, 1, 2, 3, 4

d] x = - 2, - 1, 0, - 1, - 2

y = 2, 3, 4, 5, 6

2. The function f (x) varies directly with x and f (x) = 2 where x = 10

what is the value of f (x) if x = 40

a] 320

b] 45

c] 200

d] 8

+5

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