Question

Which of the following coordinates would be on the line y = 2x?

a) (0, 2)
b) (2, 0)
c) (1, 2)
d) (2, 2)

Answer 1

The answer is C (1,2)

Answer 2

The answer is C.

Explanation:

You have to substitute the x-values into the equation to see whether it suits the y-value :

`y = 2x`

`let \: x = 0 \\ y = 2(0) \\ y = 0 \: (incorrect)`

`let \: x = 2 \\ y = 2(2) \\ y = 4 \: (incorrect)`

`let \: x = 1 \\ y = 2(1) \\ y = 2 \: (correct)`

`let \: x = 2 \\ y = 2(2) \\ y = 4 \: (incorrect)`