Download presentation

Presentation is loading. Please wait.

Published byEthan Page Modified over 4 years ago

1
To write the equation of a line we need to know 1. The slope 2. One point on the line

2
X Y 5 5 -5 (-, ) Given a slope and a point on the line. Use the POINT-SLOPE form ! y – y 1 = m ( x – x 1 )

3
X Y 5 5 -5 (-, ) Use the POINT-SLOPE form ! y – y 1 = m ( x – x 1 ) Find the SLOPE Given 2 points on the line

4
X Y 5 5 -5 (-, ) y = mx + b Use SLOPE-INTERCEPT form ! Given the y-intercept * Note: We will also need either the slope (m) or another point on the line (x, y) in order to find the equation.

5
X Y 5 5 -5 (-, ) Two variables x and y vary directly (are directly proportional) if the ratio of y to x is always the same. The ratio of dependent to independent is constant. If two quantities always vary at the same rate, they vary directly. (they are directly proportional) y/x = k

6
X Y 5 5 -5 (-, ) y/x = k Then y = kx the constant of variation Dependent Variable Independent Variable = K

7
X Y 5 5 -5 (-, ) The sides of similar triangles are in proportion. In other words, the ratio of any large side to the corresponding small side is always the same (constant) They vary directly! 4 15 x 12

8
X Y 5 5 -5 (-, ) To create a model for direct variation, start with Then use the known information to find the constant of variation! y = kx 4 15 x 12 12 = k(4) k=3

9
X Y 5 5 -5 (-, ) Re-write the equation : y = 3x 4 15 x 12 Now use this equation to find other values… (x, 15) what is x? 15 = 3x 5=x

10
X Y 5 5 -5 (-, ) The number of chickens varies directly as the number of eggs. Farmer Ralfi has 220 chickens and 36 eggs. If John wants to be a farmer like Ralfi and he buys 40 chickens, how many eggs can he expect?

Similar presentations

Presentation is loading. Please wait....

OK

Graph Linear Systems Written in Standard Form

Graph Linear Systems Written in Standard Form

© 2018 SlidePlayer.com Inc.

All rights reserved.

To ensure the functioning of the site, we use **cookies**. We share information about your activities on the site with our partners and Google partners: social networks and companies engaged in advertising and web analytics. For more information, see the Privacy Policy and Google Privacy & Terms.
Your consent to our cookies if you continue to use this website.

Ads by Google

Ppt on primary and secondary data Free ppt online viewer Download ppt on areas of parallelograms and triangles Ppt on soft contact lenses Ppt on automobile industry in india Ppt on supply chain management of mcdonald Ppt on vegetarian and non vegetarian Ppt on area of parallelogram and triangles Ppt on organisation of data for class 11 Ppt on atrial septal defect