Question

What would be the y-intercepts of the functions y=5^x and y=log5(x)?

Answer 1

someone please help omg

Answer 2

to find the y-intercept of a function like this, the general approach is to set x= to 0 and find y. Note that this is not true of the log function, but is true of y=5^x.

Please evaluate y=5^x when x=0.

Answer 3

hint:
a^0=1

Answer 4

y=5^0 would be equal to 1

Answer 5

So the y-intercept of y=5^x would be 1?

Answer 6

In regard to \[y=\log_{5} x, \]

why don't you graph this function and determine from the graph whether / where a y-intercept exists? To helpers: this question was aimed at @mysterylizard.

Answer 7

Verify that the y-int. of 5^x is 1 by graphing it.

Answer 8

Mystery?

Answer 9

I graphed log5(x) and it kind of looks like it crosses the y-intercept at -1, but I can't tell 100%

Answer 10

Have a graphing calculator?
You can look up graphs of many different functions simply by searching the 'Net. Try searching for "log function."

Answer 11

I don't have my graphing calculator with me, so I looked up the graph on the Internet. However, it didn't include exactly where the y-intercept is. I only guessed it was -1 from looking at the graph. Like I said, I'm not sure.

Answer 12

Actually, Mystery, the log function never crosses the y-axis, and thus has no y-intercept. On the other hand, y=x^5 definitely has such an intercept; it is (0,1).

Answer 13

Okay, thank you so much

Answer 14

Please see

https://www.google.com/search?q=log+function&espv=2&tbm=isch&imgil=62IQjmNM_jdnlM%253A%253BstAGHl4_xGovmM%253Bhttps%25253A%25252F%25252Fen.wikipedia.org%25252Fwiki%25252FLogarithm&source=iu&pf=m&fir=62IQjmNM_jdnlM%253A%252CstAGHl4_xGovmM%252C_&biw=1360&bih=673&ved=0ahUKEwi2hIWx2ePJAhUX32MKHf25CDQQyjcIKA&ei=PRZzVvbxM5e-jwP986KgAw&usg=__fuc3pLFxVmyreLstt2ASlPlCEWo%3D#imgrc=62IQjmNM_jdnlM%3A&usg=__fuc3pLFxVmyreLstt2ASlPlCEWo%3D

You're welcome!!