Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our Privacy Policy and User Agreement for details.

Successfully reported this slideshow.

Like this presentation? Why not share!

- Business Math Chapter 3 by Nazrin Nazdri 10147 views
- Application of Mathematics in Busin... by jafar_sadik 26536 views
- Element of Art - Line by RodriguezArt 96866 views
- Horizontal and Vertical Lines by Phil Clark 396 views
- Abs news 2012_abril by Abs Pecplan 2254 views
- Abs 2011 angus final product by Abs Pecplan 511 views

13,569 views

Published on

No Downloads

Total views

13,569

On SlideShare

0

From Embeds

0

Number of Embeds

1,435

Shares

0

Downloads

39

Comments

0

Likes

1

No embeds

No notes for slide

- 1. Vertical and Horizontal Lines<br />Finding the equations of <br />
- 2. How to know which is which…<br />A vertical line will be written as x = #. Since the <br />line will have slope that is undefined, the line <br />will ONLY intersect the x axis.<br />x = 3<br />x = -1<br />x = 6<br />
- 3. And the other….<br />A horizontal line will be written as y = #. This <br />type of line has a zero slope, so it will only <br />intersect the y axis.<br />
- 4. Finding the equation<br />Find the equation of horizontal line that goes <br />through the point (8, 4)<br />Since a horizontal line is ‘flat’ line, the only way <br />to draw a line with a zero slope through that <br />point is draw a line through the y axis at 4.<br />So the line is y = 4<br />
- 5. Finding the equation, con’t<br />Find the equation of vertical line that goes <br />through the point (-2, 7)<br />A vertical line has an undefined slope. The only way <br />to draw a vertical line through that point is draw a <br />line through the x axis at -2.<br />So the line is x = -2<br />
- 6. Parallel and Perpendicular Lines<br />If you have horizontal line, you know the slope is zero, which can be <br />written as 0/1.<br />A parallel line would also have a slope of 0….another horizontal line.<br />A perpendicular line would have a slope that is the negative reciprocal <br />of that…. -1/0 <br />WHAATTT!?!?!?!?!<br />That is UNDEFINED which means a line that is perpendicular to a <br />horizontal line must be vertical .<br />
- 7. Example 1<br />Find the equation of line parallel to y = 6 through the <br />point (4, 2).<br />Parallel means “same slope”… and this line has a <br />slope of zero.<br />That means our parallel line must also be ‘flat’.<br />Y = 2<br />
- 8. Example 2<br />Find the equation of line parallel to y = 3 through the <br />point (-2, 12).<br />Parallel means “same slope”… and this line has a <br />slope of zero.<br />That means our parallel line must also be ‘flat’.<br />Y = 12<br />Seeing a pattern???<br />
- 9. Example 3<br />Find the equation of line parallel to y = -9 through the <br />point (13, -5).<br />Parallel means “same slope”… and this line has a <br />slope of zero.<br />That means our parallel line must also be ‘flat’.<br />Y = -5<br />When the line is parallel, keep the same variable and set it equal to that coordinate value. Soooooo….<br />
- 10. Example 4<br />Find the equation of line parallel to x = -9 through the <br />point (13, -5).<br />Parallel means “same slope”… and this line has a <br />slope that is UNDEFINED.<br />That means our parallel line must also be vertical.<br />x = 13<br />Now for perpendicular….<br />
- 11. Example 5<br />Find the equation of line perpendicular to x = 3 through the <br />point (5, 7).<br />Perpendicular means the slope will be the negative reciprocal. Our <br />original line is vertical, so the perpendicular slope will be zero…making <br />the line horizontal <br />So, we have a line that is horizontal (y = ) through the given point<br />y = 7<br />hhmmmmm….<br />
- 12. Example 6<br />Find the equation of line perpendicular to x = 8 through the <br />point (9 -1).<br />Perpendicular means the slope will be the negative reciprocal. Our <br />original line is vertical, so the perpendicular slope will be zero…making <br />the line horizontal <br />So, we have a line that is horizontal (y = ) through the given point<br />y = -1<br />See it yet???<br />
- 13. The ‘rule’<br />Parallel: keep the same variable and set it equal to the value in the point.<br />Perpendicular: that the other variable and use the value of the other variable in the point.<br />

No public clipboards found for this slide

×
### Save the most important slides with Clipping

Clipping is a handy way to collect and organize the most important slides from a presentation. You can keep your great finds in clipboards organized around topics.

Be the first to comment