Which one of these graphs could be a sketch of the graph of the function y = 2x?

Answer:

10) B

For this question, you can substitute values into the the variables ‘y’ and ‘x’

So, when
x = 1, y = 2 (This eliminates D)
x = 0, y = 1 (This immediately rules out A & C)

(IT IS IMPORTANT TO UNDERSTAND THE POWER RULES)