If y = 2x and x = 7, what is y?

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Multiple Choice

If y = 2x and x = 7, what is y?

Explanation:
This question tests evaluating an expression when a value is given. The expression y = 2x means you double whatever x is. If x equals 7, substitute 7 for x: y = 2 × 7 = 14. So y is 14. That matches the number listed for the result. With a different value for x, you’d get a different y, but here the fixed x = 7 leads to 14.

This question tests evaluating an expression when a value is given. The expression y = 2x means you double whatever x is. If x equals 7, substitute 7 for x: y = 2 × 7 = 14. So y is 14. That matches the number listed for the result. With a different value for x, you’d get a different y, but here the fixed x = 7 leads to 14.

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