Graph the six terms of a finite series where a1 = 5 and r = 1.25.

I looked through my lessons and honestly do not get how to do this. I know I am supposed to use the equation Sn=(a1-a1r^n)/(1-r)

Question

Graph the six terms of a finite series where a1 = 5 and r = 1.25.

I looked through my lessons and honestly do not get how to do this. I know I am supposed to use the equation Sn=(a1-a1r^n)/(1-r)

sleepyjess · Answer

These are the answer choices.

sleepyjess · Answer

$$S_{n}=(a_{1}-a _{1}r^n)/(1-r)$$
This is what the equation was supposed to be.

sleepyjess · Answer

@satellite73

sleepyjess · Answer

@Callisto

sleepyjess · Answer

@dumbcow

callisto · Answer

The formula Sn=(a1-a1r^n)/(1-r) is to find the sum of first n terms of a G.S.
To find the nth term in a GS, the formula should be T(n) = a1 r^(n-1)

callisto · Answer

If you are asked to graph the first 6 terms, then find the first 6 terms using that formula and graph it.

callisto · Answer

I can't see the file you attached though.

sleepyjess · Answer

Does that equation give me the y value of the points and n is the x value?

callisto · Answer

Yes, I suppose it does. That equation should be T(n) one though.

sleepyjess · Answer

Here are the answer choices in a word doc.

sleepyjess · Answer

Does that help @Callisto

callisto · Answer

Have you find the 2nd term of the sequence?