Question

PLEASE HELP. FAN, MEDAL, AND TESTIMONY

Suppose you are saving money for a new cell phone. At week 0 you have $20 and at week 10 you have $100. If y represents the amount of money you have saved and x represents the number of weeks, find and interpret the slope of the linear equation.

a) 1/8 ; $8 is put away each week.
b) 10; $10 is put away each week.
c) 8; $8 is put away each week.
d) 1/10; $10 is put away each week.

Answer 1

@kmeis002

Answer 2

@aum

Answer 3

C, since you start with 20 and (8*10) equals 80, which added equals 100, and since slope is represented by\[y _{2}-y _{1} \div x _{2}-x _{1}\] 100-20 is 80 (y) and 10-0 is 10 (x), 80/10 simplifies to 8. Hope I helped!

Answer 4

Thank you so much!!! I understand it! Could you help me with a few more? @nickhunter172

Answer 5

Yeah, sure. What you got for me?

Answer 6

Let me just type them real quick

Answer 7

You research the average cost of a tank of gasoline for a certain type of car for several recent years to look for trends. The table shows your data. What is the equation for a line of best fit? How much would you expect to pay for a tank of gas in the year 2019?

Answer 8

May I have the table please?

Answer 9

a) y= 1.006x + 26.40; $47.52
b) y= 1.006x + 26.40; $58.92
c) y= 26.40x + 1.006; $47.52
d) y= 26.40x + 1.006; $58.92

Answer 10

@nickhunter172

Answer 11

You can eliminate C and D straightaway because the slopes are ridiculous.

Answer 12

Yeah I was thinking it was a little weird to have that as a slope.

Answer 13

Is it A?

Answer 14

The answer is A. Plug in 21 for x (0 is equivalent to 1998, since that is the first point given with the y-intercept 26.4, and 1998+21=2019.) 1.006*21= 21.126 [round down to 21.12 since you can't have 0.6 of a cent.] Add the y-intercept of 26.4, and get 47.52.

Answer 15

Yay I'm glad I at least got that right

Answer 16

If a function f(x) is shifted to the left one unit, what function represents the transformation?

Answer 17

a) f(x+1)
b) f(x-1)
c) f(x) + 1
d) f(x)-1

Answer 18

@nickhunter172

Answer 19

I'm thinking B, but please graph it just to make sure.

Answer 20

It is B, I was right. Constants outside of the bracket dictate vertical movement.

Answer 21

Okay, thats what I thought cause the graph was turning out to be that way. How many more questions can you handle? Haha I have a study guide and I am so unprepared for it due to being sick, and having a horrible teacher.

Answer 22

Don't worry, my honors geometry teacher treats us like kids. I'll take any questions you got for me.

Answer 23

I'm taking Honors Algebra 2 and she is horrible. Thank you so much!

Answer 24

Let g(x) be the reflection of f(x)=x^2+5 in the x-axis. What is a function rule for g(x)?

a) g(x) = -x^2 - 5
b) g(x) = x^2 + 5
c) g(x) = x^2 - 5
d) g(x) = -x^2 + 5

Answer 25

-5 changes the y-intercept of the function, so C would be the most accurate reflection.

Answer 26

Okay

Answer 27

What is the equation of the absolute value function?

Answer 28

a) y= 6|x+2|-2
b) y= 6|-x-2|+2
c) y= -6|x+2|-2
d) y= -6|x-2|-2

Answer 29

I think it's b

Answer 30

Yep, that would be it.

Answer 31

Okay so I have 3 more questions and they require that I show all work. Every step. Can you help me on those or should I open a new question?

Answer 32

@nickhunter172

Answer 33

I wish you could help me with my portfolio and test, you're so amazing. Hahaha

Answer 34

I can help, and thank you. :3