## calculusxy one year ago MEDAL for help!!!! Question is posted below:

1. calculusxy

Write a set of walking instructions based on the data in Tables A and B.

2. calculusxy

@Michele_Laino

3. calculusxy

What do they mean by "walking instructions''?

4. Michele_Laino

maybe the function distance as function of time for both tables A and B

5. Michele_Laino

I'm not sure

6. Michele_Laino

do you know the least square method, for statistical processing of data?

7. calculusxy

No

8. calculusxy

But I can learn !

9. Michele_Laino

what subject are you studying at your school?

10. calculusxy

Well i am a rising eight grader...

11. calculusxy

And it's just math, latin, english, history, and physics.

12. Michele_Laino

13. calculusxy

Okay

14. Michele_Laino

I understand. We have to write two functions which model your data contained in both tables

15. Michele_Laino

for example, let's consider the first table

16. calculusxy

so can we use: y = mx +b

17. Michele_Laino

yes! that's right!

18. calculusxy

Okay so to find m: $\frac{ (y_2 - y_1) }{ (x_2 -x_1) }$

19. Michele_Laino

when x=0, we have y=0.8, so we can write: 0.8=m*0+b=b so b=0.8

20. calculusxy

So i am going to use the coordinates: (1,1) and (2,1.2) $\frac{ (1.2 - 1) }{ (2 -1 ) }$

21. Michele_Laino

similarly, when x=1, we have y=1 so we can write: 1=m*1+b=m+b=m+0.8 then: m=1-0.8=0.2 I prefer the substitution method

22. calculusxy

$\frac{ 0.2 }{ 1 }$

23. Michele_Laino

ok! so we can write: y=0.2*x+0.8

24. calculusxy

yes

25. Michele_Laino

now we have to do the same, with the second table

26. calculusxy

for b:$\frac{ 3.2 - 3.6 }{ 3 -2 }$

27. calculusxy

That would show a negative slope right?

28. Michele_Laino

yes! it is -0.4

29. calculusxy

$\frac{ -0.4 }{ 1 }$

30. Michele_Laino

ok!

31. calculusxy

so y = -0.4x + 4

32. Michele_Laino

so the requested function is: y=-0.4*x+4

33. calculusxy

So those are the two answers right?

34. Michele_Laino

yes! right!

35. calculusxy

Can you please help me with my physics homework as well?

36. Michele_Laino

ok!

37. calculusxy

Thank you i will make a new post

38. Michele_Laino

ok!