# Assessment 4 #### If we plot the graph for the elliptic curve equation over real numbers, and P & Q are two points on ellipse, what is P+Q? * [ ] Tangent at P intersected on the elliptic curve when extended * [ ] Tangent at Q intersected on the elliptic curve when extended * [x] The inverse of point obtained by extending the line joining P and Q on the elliptic curve * [ ] Point of intersection on the elliptic curve obtained by extending the line joining points P and Q --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://hub.bsvblockchain.org/higher-learning/bsv-academy/bitcoin-primitives-digital-signatures/ecdsa-prerequisites/assessment-4.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.