x Turn on thread page Beta
 You are Here: Home >< Maths

# e^x graph transformation watch

1. how do i know what e^(2x + 1) intersect at? and start at?
2. (Original post by ihatePE)
how do i know what e^(2x + 1) intersect at? and start at?
Erm.. what?

Are you asking about the axes intersections? What do you mean by 'start at' ??
3. (Original post by RDKGames)
Erm.. what?

Are you asking about the axes intersections? What do you mean by 'start at' ??
yes y intersection and start at as in the asymptote if that makes sense? so e^x is asymptotic to the line y=0 and intersects at y=1
4. (Original post by ihatePE)
yes y intersection and start at as in the asymptote if that makes sense? so e^x is asymptotic to the line y=0 and intersects at y=1
y intersection is given by substituting into the eq.

As for the asymptote, note that there exists a sequence of transformations from and which doesn't have anything to do with the y-axis/direction, so the horizontal asymptote y=0 is unchanged. Alternative, observe what value this function approaches as
5. (Original post by ihatePE)
yes y intersection and start at as in the asymptote if that makes sense? so e^x is asymptotic to the line y=0 and intersects at y=1
To find the y-intercept, you simply plug into the function. And the intercept can be found by taking the asymptote of and adding to it the constant by which the new function has been translated up
6. (Original post by RDKGames)
y intersection is given by substituting into the eq.

As for the asymptote, note that there exists a sequence of transformations from and which doesn't have anything to do with the y-axis/direction, so the horizontal asymptote y=0 is unchanged. Alternative, observe what value this function approaches as

(Original post by MR1999)
To find the y-intercept, you simply plug into the function. And the intercept can be found by taking the asymptote of and adding to it the constant by which the new function has been translated up
can u tell me why e^2x intersects at y=2 plz? thank you
7. (Original post by ihatePE)
can u tell me why e^2x intersects at y=2 plz? thank you
It doesn't... it intersects the y-axis at 1!
8. (Original post by ihatePE)
can u tell me why e^2x intersects at y=2 plz? thank you
Its one
9. (Original post by RDKGames)
It doesn't... it intersects the y-axis at 1!
sorry, what about e^2x + 1. the +1 isnt part of the power, it intersects at y=2
10. (Original post by ihatePE)
sorry, what about e^2x + 1. the +1 isnt part of the power, it intersects at y=2
Yes, and it should be obvious why by what I've already said in this thread.

Plug in x=0
11. (Original post by RDKGames)
Yes, and it should be obvious why by what I've already said in this thread.

Plug in x=0
oooo i just see it now thanks

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: February 10, 2018
Today on TSR

### Any tips for freshers...

who are introverts?

### More snow?!

Discussions on TSR

• Latest
Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE