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Mathematics 7 Online
OpenStudy (anonymous):

Which graph best represents the function f(x) = 1(1.5)x?

OpenStudy (anonymous):

Would you like me to walk you through how to graph this so you can see?

OpenStudy (anonymous):

yes please

OpenStudy (anonymous):

First let me ask, can you look closely at the equation to be graphed and confirm that this f(x) = 1(1.5)x and not this f(x) = 1(1.5)^x Is the equation?

OpenStudy (anonymous):

no, my mistake, the equation is f(x)= 1(1.5)^x

OpenStudy (anonymous):

forgot to add that port, my bad x.x

OpenStudy (anonymous):

part*

OpenStudy (anonymous):

Alright very cool. Let's make a table of values to draw our own graph so we can see what it looks like. I would like to point out that f(x) = y This is how we start a table of values. |dw:1405109301692:dw| It is meant to give us x's and y's we can turn into points on a graph that when put together make (x, y) points/coordinates we can then plot.

OpenStudy (anonymous):

So we need to start with some values of x. I always like to start with x = -1, 0, and 1 so that the calculations will be easier.

OpenStudy (anonymous):

If we plug in -1 for x, x = -1 We will get this, f(-1) = 1(1.5)^-1 |dw:1405109461279:dw|

OpenStudy (anonymous):

Sorry about that. When we plug in -1 for x we get f(-1) = 1(1.5)^-1 Which is 1/ 1(1.5)^1 1/ 1(1.5) 1/ 1.5 1/3 f(-1) = 1/3 And if we plug in 0 for x, we get, f(0) = 1(1.5)^0 Anything raised to the 0 power is 1 Examples include 10^1 = 1 2^1 = 1 2342^1 = 1 So f(0) = 1(1) or 1|dw:1405110082278:dw|

OpenStudy (anonymous):

We can now say we have the points (-1, 1/3) and (0, 1) to plot on a graph. |dw:1405110218127:dw|

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