1 / 8

Corrections 143-146

Corrections 143-146. Page 143. 1) a) $1.5/year  the value increases by $1.5 per year B) $0 /year  the value remained constant C) $- 6/year  the value decreased by $6 per year 2) a) y = 15 B) horizontal line through y = 15 C) constant or zero variation. Page 143. 3) A) y = 30x

fenella-peoples
Download Presentation

Corrections 143-146

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. Corrections 143-146

  2. Page 143 • 1) a) $1.5/year  the value increases by $1.5 per year • B) $0 /year  the value remained constant • C) $- 6/year  the value decreased by $6 per year • 2) a) y = 15 • B) horizontal line through y = 15 • C) constant or zero variation

  3. Page 143 • 3) • A) y = 30x • C) direct variation

  4. Page 144 • 4) • A) y = 10x + 15 • c) Partial variation • 5) a) y = 1200 / x

  5. Page 144 • 6. a) $15 • B) 120 • C) y = 15x – 120 • D) 1. less than 8 2. More than 8 • 7) a) 15 000 Litres (find a and b values, write rule, then set x equal to7 hours) y = -5000 x + 50 000 • B) 10 hours (replace y with 0)

  6. Page 145 • 8 a) independent: time • Dependent: volume of water in the tank • B) y = -5t + 80 • C) 1. replace y with 0 and solve for t  16 hours • 2. the graph hits the x axis (where y = 0) at t = 16 hours

  7. Page 145 • 9) • A) A: y = 300 B: y = 10x C: y = 5x + 100 • B) A: zero B: direct C: Partial • D) if the employee sells less than 30 items • E) if the employee sells more than 30 items • F) c is never the best option (it never has the greatest y value)

  8. Page 145 • 10) x = # of videos y = cost • A: y = 2.5x + 10 • B: y = 3x • Use comparison to see how many videos it would take before the cost is the same • 3x = 2.5x + 10  x = 20 videos • If you rent more than 20 videos per year, option A is better. Less than 20, option B is better

More Related