Question

Did I do this Algebra problem correctly?

Answer 1

What is the the y-intercept of the graph y=4x-2

Answer 2

I got -2,. is this accurate?

Answer 3

Yes, you did it correctly. Nice job! :)

Answer 4

WooO!

Answer 5

Another question, if you don't mind?

Answer 6

Surething.

Answer 7

Determine whether the graph of y=a^x where a > 0 and a=/1, sometimes, always, or never has an x intercept. I think it's sometimes, correct?

Answer 8

Hello? )

Answer 9

I'm not part of your fan club! :D

Answer 10

I believe that is correct.

Answer 11

Alright. Certainty is very important. I hope you won't get offended if I re-ask this.

Answer 12

Sure :)

Answer 13

Here's one final problem ! :)

Answer 14

Mitosis is the process of cell reproduction in which one cell divides itself into two identical cells. E. coli is a fast-growing bacterium that is often responsible for food poisoning in uncooked meat. It can reproduce itself in 15 minutes. If you begin with 100 E. coli bacteria, how many will there be in 1 hour?

Answer 15

I THIIINK it's 1400 bacteria, correct?

Answer 16

Wait. Actually, I'm not sure about the last question that you asked. Because a can't be negative, it should always have an x-intercept, shouldn't it?

Answer 17

IDK. Ha ha. Since we're both ultimately unsure, let's focus on the current one. :)

Answer 18

Ok. Good thinking.

Answer 19

Well, if there are 4 15-min intervals in an hour, and you start with 100, it should go :
100-200-400-800-1600
Start - 15 - 30 - 45 - 60

Answer 20

Wat.

Answer 21

Wait...it's 1600 bacteria, correct?

Answer 22

Yes, that's correct. I'm going to plug it into the growth formula just to check, though.

Answer 23

ok!

Answer 24

Ok. It should be correct. Does it make sense how I came to that answer, though?

Answer 25

Yes! :D

Answer 26

Also, on the graphing question :
If x can equal anything, it can also equal 1.
Which means that y=2x^1 is a possibility. As you probably know, that has an x-intercept.
If x is more than 1, you would have a parabola that always touches the origin, thus, always having an intercept.
However, if x = -1, the line inches closer and closer to the axis but doesn't touch it (I think). So, the answer would be 'sometimes'.
Maybe try asking that as a new question? :)

Answer 27

Good luck!

Answer 28

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