1. anonymous

2. anonymous

@Michele_Laino @Kanra

3. Michele_Laino

question#1: hint: y=24 and x=36, then we can write 24= 36-12

4. anonymous

so like?

5. Michele_Laino

you have to search for the right formula, which links x with y

6. Michele_Laino

for example, if I choose y=18, and x=30, namely I choose data from the first row, I can write this: 30-6= 24, which is different from 18, so the first formula, namely y=x-6 is not the right formula

7. Michele_Laino

furthermore, we have: x+6= 30+6= 36 which is different from 18, so also the last option is not the right option

8. Michele_Laino

so what is the right formula? it is the formula in the second option or in the third one?

9. anonymous

2nd @Michele_Laino

10. Michele_Laino

let's check your answer: the second option is: y=x-10, so if I replace x with 30, and y with 18, I get: 18= 30-10 which is a false statement so the second option can not be the right option

11. anonymous

so the third @Michele_Laino

12. Michele_Laino

correct!

13. Michele_Laino

question #2 here we have to compute y when x=64, and we have to use the formula of question #1 so we have to do this computation: y=x-12=64-12=...?

14. anonymous

idk

15. anonymous

@Michele_Laino

16. Michele_Laino

what is 64-12=...?

17. anonymous

52

18. Michele_Laino

so, what is the right option?

19. anonymous

2nd

20. Michele_Laino

correct!

21. anonymous

@Michele_Laino then 2 more after this

22. Michele_Laino

here we have to find the right formula, which links x with y

23. anonymous

ok

24. Michele_Laino

from your data I see that when: x=1 ---> y=18 x=2 ---> y=36 x=3 ---> y= 54 x=4 ---> y=72 namely each y-value is 8-times of the corresponding x-value so what is the formula?

25. Michele_Laino

oops.. each y-value is 18-times of the corresponding x-value

26. anonymous

ok

27. Michele_Laino

so, what is the formula which links x with y?

28. Michele_Laino

is the right formula this one: y=18x

29. anonymous

idk too be honest

30. Michele_Laino

it is the right for ula, since if we replace x with 1, we have: y=18*1=18 if we replace x with 2, we have:y= 18*2=36 if we replace x with 3 we have: y=18*3=54, and finally if we replace x with 4 we have: y=18*4=72

31. Michele_Laino

formula*

32. Michele_Laino

so, if we replace x with 8, we get: y=18*x=18*8=...?

33. anonymous

144 @Michele_Laino

34. Michele_Laino

correct!

35. Michele_Laino

second question: I consider the first point, namely x=0, and y=8 Then I substitute them into the formula y=8x, so I get: 8= 8*0=0 which is a false statement, so the first point can not be the right option

36. Michele_Laino

now, please try with other points

37. anonymous

wym @Michele_Laino

38. anonymous

nvm bro im done

39. Michele_Laino

question #5, Hint: if I replace x with 2, I get this: $\Large y = x + \frac{2}{5} = 2 + \frac{2}{5}$ so what is the right option?

40. anonymous

its all good man I passed it lol

41. Michele_Laino

ok! :)