Saturday

October 25, 2014

October 25, 2014

Posted by **Tristan** on Tuesday, February 19, 2013 at 6:00pm.

- math quiz tomorrow -
**Reiny**, Tuesday, February 19, 2013 at 7:04pmwhy don't you just get yourself a few ordered pairs for each one ?

e.g. for

y = 2(3^x) - 3

(0, -1), (1, 3) , (2,15) , (3, 51) , don't graph the last one, rather just visualize where it is, and what happens if x gets larger

if x = -1,

y = 2(1/3) - 3 = -2.33 ---(-1, -2.3)

if x = -2

y = 2(1/9) - 3 = appr -2.78 ----> (-2, -2.8)

..

if x = -5

y = 2(1/243) - 3 = -2.991 ----> (-5, -2.99)

so clearly the graph approaches -3 as you go to the left, and it rises sharply as you go to the right

the y-intercept is 0,-1)

for the second one,

y = -3 ( 3^-x )

eg.

if x = 0 , y = -3(1) = -3

if x = 1 , y = -3(3^-1) = -3(1/3) = -1

if x = -1 , y = -3(3^1) = -9

if x = 2 , y = -3(3^-2) = -3/9 = -1/3

if x = -2 , y = -3(3^2) = -27

that should be enough to show what is happening.

**Answer this Question**

**Related Questions**

math (graphing) - I need to graph "y = -2x+5" and "y = 4/5x-3"... I don't think ...

algebra - Use the five steps for problem solving to answer the following ...

ALGEBRA - i AM HAVING TROUBLE GRAPHING SOLVING THE FOLLOING BY GRAPHING. cAN ...

algebra 1 - Got a test tomorrow... Say you have a system of equations (linear), ...

Math - I am having probles with solving systems of equations by graphing please ...

Algebra - College intro - I'm having trouble learning "Solving systems of ...

algebra - Try graphing the following two equations. Eq 1 y = 2x + 3 Eq 2 y = 2x...

math - 8x -5y =20 5y -8x=-20 x= -4 Solve the system of equations by graphing. ...

Math - I have a problem in graphing that says: Find 2 numbers that satisfy this ...

Math 156 - Write two different equations that can be used to solve this problem...