If (-1, y) lies on the graph of y = 3^x+1, then y =

0
1/3
1

Question

If (-1, y) lies on the graph of y = 3^x+1, then y =

0
1/3
1

isaiah.feynman · Answer

@xo_kansasprincess_xo  How to solve this, when x = -1, what is y?

hockeychick23 · Answer

If (-1, y) lies on the graph of y = 3^x+1, then y =

Ok so first we need to plug in -1 for x: y=3^-1+1. 
So 3^-1= 1/3+1. 
So 1/3+1=y
y=1 1/3
Its not one of the answers you posted but its the correct answer

anonymous · Answer

@hockeychick23 That's obviously not the correct answer since it's not one of the choices!

hockeychick23 · Answer

it's correct, whether its written as 4/3 or 1 1/3 and its hard to believe you have just 3 answer choices

tkhunny · Answer

@xo_kansasprincess_xo 

You HAVE to start showing your own work.  This would have cleared up the confusion on this one.  I don't believe you cannot substitute x = -1 into your equation.

Your equation was mistaken for this $y = 3^{x} + 1$.  For this, the correct answer is y = 4/3, whether or not this is in the set of given answer choices.

Had you written, y = 3^(x+1), it would have meant $y = 3^{x+1}$, and there would have been no confusion.  Now, go ahead and substitute x = -1 and resolve the right hand side to produce the corresponding y-value.