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Question 1112510: For which function, y = 2x or y = x+2, is the value of y always greater than the value of x? Explain you answer.
Answer by math_helper(2461)   (Show Source):
You can put this solution on YOUR website! What happens when x is less than or equal to zero? For example, let x=-5 ... what do you think?
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Let's build a table:
x 2x x+2
— ——— ———
5 10 7
1 2 3
0 0 2
-1 -2 1
-2 -4 0
-5 -10 -3
So, now I ask in which column are the values _always_ greater than x? Remember, the more negative a number is the lower its value ( -10 is less than -5, written mathematically -10 < -5).
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