- #1

- 243

- 0

x=6,y=1+6t

for some reason I don't know how to find the point. If I graph it I understand but I can't work it out.

- Thread starter thomasrules
- Start date

- #1

- 243

- 0

x=6,y=1+6t

for some reason I don't know how to find the point. If I graph it I understand but I can't work it out.

- #2

- 1,085

- 6

What is the t supposed to be in y = 1+6t? A constant (number)? If 't' is a constant then you basically use the same idea.

- #3

- 243

- 0

Ok I get everything from the beginning, and I know I'm retarded I should have understood that. What is making me confused is the y=1+6t part.mattmns said:What is the t supposed to be in y = 1+6t? A constant (number)? If 't' is a constant then you basically use the same idea.

that comes from the vector equation r=(6,1)+t(0,6)

Why do you even need to know the y=1+6t part? How do you check from that? I originaly thought you needed to set x or y to zero.....

BTW thanks

- #4

- 243

- 0

- #5

- 243

- 0

got it :D

- #6

HallsofIvy

Science Advisor

Homework Helper

- 41,833

- 956

r= (6,1)+ t(0, 6) is the same as the parametric equations x= 6, y= 1+ 6t.

Since x is always 6, that line does not cross the y-axis. Of course, it crosses the x-axis at (6, 0).

In general, if you have parametric equations x= a+ bt, y= c+ dt, you find the x-intersept by setting y= 0, solve for t and use that value of t to find x. To find the y-intersept do the opposite: set x= 0, solve that equation for t and use that value of t to find y.

- #7

- 42

- 0

i just want to say. HallsoftIvy is a very patient and active tutor.

good work!

good work!

- #8

HallsofIvy

Science Advisor

Homework Helper

- 41,833

- 956

The real problem with the internet is that you can't use the two-by-four across the head and shoulders method!

- Last Post

- Replies
- 8

- Views
- 2K

- Last Post

- Replies
- 2

- Views
- 3K

- Last Post

- Replies
- 4

- Views
- 1K

- Last Post

- Replies
- 8

- Views
- 2K

- Last Post

- Replies
- 2

- Views
- 2K

- Last Post

- Replies
- 6

- Views
- 4K

- Last Post

- Replies
- 3

- Views
- 2K

- Replies
- 2

- Views
- 697

- Last Post

- Replies
- 2

- Views
- 1K

- Last Post

- Replies
- 3

- Views
- 2K