What is f(-2) given f(x) = 2x + 3?

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What is f(-2) given f(x) = 2x + 3?

Evaluating a linear function means plugging the input value into its expression. For f(x) = 2x + 3, substitute x with -2: f(-2) = 2(-2) + 3 = -4 + 3 = -1. The function doubles the input and then adds 3, so at -2 you get -4 plus 3, which is -1. The other numbers would require different inputs or a different operation: -5 would come from input -4, 1 from input -1, and -2 from input -2.5.

Evaluating a linear function means plugging the input value into its expression. For f(x) = 2x + 3, substitute x with -2: f(-2) = 2(-2) + 3 = -4 + 3 = -1. The function doubles the input and then adds 3, so at -2 you get -4 plus 3, which is -1. The other numbers would require different inputs or a different operation: -5 would come from input -4, 1 from input -1, and -2 from input -2.5.

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