1 / 15

Bellwork

Bellwork. If 2x + 5y = -20 and x = 0, what is y? What is the slope of the line containing the points (2, 7) and (3, -7)? Orphelia bought x apples. If each apple cost $0.59, write an equation for y, the total cost of x apples. Lesson 3.5. Write and Graph Equations of Lines. Objective.

kelly-bryant
Download Presentation

Bellwork

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Bellwork • If 2x + 5y = -20 and x = 0, what is y? • What is the slope of the line containing the points (2, 7) and (3, -7)? • Orphelia bought x apples. If each apple cost $0.59, write an equation for y, the total cost of x apples.

  2. Lesson 3.5 Write and Graph Equations of Lines

  3. Objective • Find Equations of Lines

  4. Standard • Prep for 17.0 – Students prove theorems by using coordinate geometry, including the midpoint of a line segment, the distance formula, and various forms of equations of lines and circles

  5. Slope-Intercept Form y = mx + b slope y-coordinate of y-intercept (0, b)

  6. How to graph slope-intercept form • Plot y-intercept (0, b) and apply slope

  7. Example

  8. Example

  9. Practice • Write the equation

  10. The real world?

  11. Standard Form variables Ax + By = C constant coefficients

  12. How to graph in Standard Form 1) Substitute x = 0 to find y-intercept (0, y) 2) Substitute y = 0 to find x-intercept (x, 0) 3) Connect dots with a line

  13. Example Graph 3x + 4y = 12

  14. The real world

  15. Homework • p.184 #1, 2, 3, 9, 11, 17, 23, 33, 45, 61

More Related