Question Video: Evaluating Linear Functions at a Specific Value | Nagwa Question Video: Evaluating Linear Functions at a Specific Value | Nagwa

Question Video: Evaluating Linear Functions at a Specific Value Mathematics • Third Year of Preparatory School

Evaluate 𝑓(2), given that 𝑓(𝑥) = 3𝑥 + 7.

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Video Transcript

Evaluate 𝑓 of two, given that 𝑓 of 𝑥 is equal to three 𝑥 plus seven.

In this question, we’re given the linear function 𝑓 of 𝑥 is equal to three 𝑥 plus seven. In order to evaluate 𝑓of two, we need to substitute 𝑥 equals two into the function. As three 𝑥 means three multiplied by 𝑥, we need to multiply three by two and then add seven. This is equal to 13.

If 𝑓 of 𝑥 is equal to three 𝑥 plus seven, then 𝑓 of two is 13.

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