If y = 2x + 3, what is y when x = 1?

Study for the TABE Math Test. Practice with flashcards and multiple-choice questions, each question offers hints and explanations. Get ready for your exam!

Multiple Choice

If y = 2x + 3, what is y when x = 1?

Explanation:
Evaluating a linear expression by substitution. Plug in the given value for the variable and then follow the order of operations. Replace x with 1 in y = 2x + 3 to get y = 2(1) + 3. Multiply first: 2 × 1 = 2, then add 3 to get y = 5. So the value is 5. (If you see other numbers, they would come from using a different x or omitting part of the expression, which isn’t the case here.)

Evaluating a linear expression by substitution. Plug in the given value for the variable and then follow the order of operations. Replace x with 1 in y = 2x + 3 to get y = 2(1) + 3. Multiply first: 2 × 1 = 2, then add 3 to get y = 5. So the value is 5. (If you see other numbers, they would come from using a different x or omitting part of the expression, which isn’t the case here.)

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