Graphs And Coordinate Geometry
Overview
Every equation in x and y has a shape hiding inside it. Coordinate geometry is the bridge between the algebra and the picture: read an equation correctly and you can predict whether its graph is a straight line, a curving parabola, a cubic wave or a two-branched reciprocal curve before a single point is plotted.
This topic covers plotting Cartesian coordinates, reading gradient and intercept straight from y = mx + c, sketching polynomial and reciprocal graphs from a table of values, using where two graphs cross to solve equations, and estimating the gradient of a curve using a tangent.
Objectives
- Use rectangular Cartesian coordinates
- Recognise that equations of the form y = mx + c are straight-line graphs with gradient m and intercept on the y-axis at (0, c)
- Draw and interpret graphs of polynomial and reciprocal functions
- Use the intersection of two curves (graphs) to solve equations
- Determine the gradients of graphs by drawing tangents
Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Graphs And Coordinate Geometry. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- What is the gradient of the line y = 5x + 2? A) 2 B) 5 C) -5 D) 7 Answer: B
- What is the y-intercept of the line y = -3x + 8? A) (0, -3) B) (0, 8) C) (8, 0) D) (0, -8) Answer: B
- The line through (1, 4) and (3, 10) has gradient: A) 2 B) 3 C) 6 D) 1/3 Answer: B
- The graph of y = 4/x is best described as: A) a straight line through the origin B) a parabola C) a curve with two branches that never touch the axes D) a cubic curve Answer: C
- The curves y = x^2 and y = 2x + 3 intersect where x^2 - 2x - 3 = 0. What are the x-coordinates of the intersection points? A) x = 1, x = -3 B) x = 3, x = -1 C) x = -3, x = -1 D) x = 1, x = 3 Answer: B
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Recommended Books
Practice Mock Questions
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