The slope of the tangent to a curve at any point is found using the derivative of the function. Plug the x-value of the point into the derivative to get the slope. Then, use the point-slope formula to write the equation of the tangent line.
The equation of tangent line to the curve y = x² at (2, 4) is?
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Question context
This question is part of 📏 Arithmetic Aptitude within the broader 🧠 Aptitude Mastery subject and appears in the ETEA Educational Testing and Evaluation Agency preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.