Question

Which scatter plot best represents the function f(x) = 3^x + 1?

Plot A: http://prntscr.com/6zpvs8
Plot B: http://prntscr.com/6zpwti
Plot C: http://prntscr.com/6zpwyz
Plot D: http://prntscr.com/6zpx3i

Answer 1

Do you have any ideas?

Answer 2

Not at all.

Answer 3

first plug in 0 for x and see what y is so we can eliminate some choices

Answer 4

That would be of help, if I knew how to find y once x = 0

Answer 5

When the exponent, or x, equals zero, the zero rule states the value of the coefficient automagically becomes one. So, when x = 0, y = 1 + 1

Answer 6

Does it remain y = 1 + 1 or would it then become y = 2?

Answer 7

It would be simplified to y = 2 ^_^

Answer 8

So, the correct graph would have y = 2 when x = 0
That eliminates B and C, I believe.

Answer 9

Yep, it does eliminate B and C. Now, when x = 2, y = 3^2 + 1. Could you simplify that?

Answer 10

3 to the second power would be equal to 9, if I remember correctly. Plus 1 would be 10.
So, y = 10 when x = 2?

Answer 11

Yep. So then you can rule out one more answer choice

Answer 12

yes so now we are only left with one grpah that has the points (0,2) and (2,10)
which answer choice is that?

Answer 13

D seems to be wrong, because it has (2, 5). At least, it looks like that.

Answer 14

D is in fact incorrect

Answer 15

So the answer would be A.

Answer 16

Correctumundo ^_^

Answer 17

yes :)

Answer 18

Thanks, both of you :)

Answer 19

Anytime ^_^

Answer 20

np