Gungirl4ever1994 3 years ago Can anyone help me? I have this as a discussion question and I am confused.. Throughout this unit, you will participate in a discussion based on the following question: How can you model data with a linear function? Take a moment to consider your response to this question. You must provide a real-world example and show how to model the problem using a linear function. Be sure to explain how you know it is a function.

1. Gungirl4ever1994

GHAZI TO THE RESCUE!!!!!

2. ghazi

consider an example of weight increasing with mass...(physics)... we know that weight = mass* gravity ....so here consider gravity as constant mass= x and weight = y ...you 'll have a linear function as y=k*x

3. ghazi

this is called as linear variation

4. ghazi

|dw:1346178962195:dw|

5. Gungirl4ever1994

still confused :/

6. ghazi

one more example is ohm's law...where current (I)is proportional to voltage (V)...(provided that temperature should be constant ) so it is V= I*R where R is constant known as resistance....so V varies linearly with current ..linear variation means equal or proportional increase in one variable for the amount of increase in other

7. ghazi

|dw:1346179148379:dw| voltage is proportional to I

8. Gungirl4ever1994

ugh.... :/

9. ghazi

still confused?

10. Gungirl4ever1994

very imma fail this discussion

11. ghazi

just consider y= x ...the more you increase x the more y increases...moreover linear means arranged or extending over a line...so values of linear equations will vary in a straight line

12. Gungirl4ever1994

so how would a real life thing fit into this?

13. ghazi

real life thing is a variation of current in a wire....that i have mentioned above...higher the applied voltage (potential difference) higher will be the current ...but if their graph will be plotted it'll be a straight line

14. Gungirl4ever1994

ok soo umm the high you turn up voltage the higher the number but it will be linear on a graph how is that?

15. ghazi

higher the voltage higher will be the current ..but graph between them will be on straight line...since they are linear

16. Gungirl4ever1994

ok im starting to get it i think.. So for my discussion could i use this but put it in my own words? and ill tell you what imma put to make sure its correct.

17. ghazi

yes sure

18. Gungirl4ever1994

Your my lifesaver as always. haha

19. ghazi

:) YW

20. Gungirl4ever1994

Ghazi is this the equation for it? F(x) = m x + c

21. ghazi

yes...it is a linear equation

22. Gungirl4ever1994

so with the votage thing which would be the current and the higher voltage?

23. ghazi

for the voltage thing it would be just voltage= resistance * current or V=I*R

24. Gungirl4ever1994

thank you

25. Gungirl4ever1994

this work So a real life situation of linear function it a current in a wire. The higher the voltage that is applied the higher the current will be. But if they are plotted on a graph even though they are changing it’ll be a linear line. The equation would look like this voltage= resistance * current.

26. Gungirl4ever1994

Ghazi lol

27. ghazi

awesome that's perfect....sorry for responding late

28. ghazi

:)

29. Gungirl4ever1994

its cool tahnks

30. ghazi

:) YW