## anonymous one year ago I Will Medal And Fan! I need explanation AND answer! hold on.. let me put the graph up

1. anonymous

|dw:1440015007670:dw|

2. anonymous

don't judge, that took me ages

3. Vocaloid

well, if our equation is y = x^3, then all we need to do is do a few quick calculations and draw a few points if x = 0, then y = x^3 = ?

4. anonymous

i don't get x ^ 3 = ? what is ^

5. Vocaloid

^ means exponent so y = x^3 = x*x*x

6. Vocaloid

I presume that your equation looks like this? |dw:1440016180277:dw|

7. anonymous

it looks like |dw:1440016208739:dw|

8. Vocaloid

oh, ok, then let's go with that if x = 0, then y = 3x = ?

9. anonymous

y = 3x is the part I don't get

10. anonymous

3(0)

11. Vocaloid

well, when we want to graph a point, we need (x,y), right? y = 3x tells us how to find y when we have x

12. Vocaloid

yes, y = 3(0) = 0 when x = 0 this gives us the point (0,0)

13. Vocaloid

now, when x = 1, y = 3x = ?

14. anonymous

3(1)

15. Vocaloid

right, and 3(1) = 3, correct? this gives us the point (1,3)

16. Vocaloid

now, let's put (0,0) and (1,3) on your graph:

17. Vocaloid

|dw:1440016450097:dw|

18. Vocaloid

now we draw a straight line through the two points, and then we have our line.|dw:1440016477564:dw|

19. Vocaloid

is that clear?

20. anonymous

Not quite. sorry it took me awhile, my dogs were fighting

21. Vocaloid

well, let's go from the top do you understand how to graph points?

22. Vocaloid

for example, if I told you to put the point (3,5) on a graph, could you do it?

23. anonymous

yes

24. Vocaloid

ok, you understand that every point has an x and y-coordinate, correct? every point looks like this: (x,y) where x = a number and y = a number, with me so far?

25. anonymous

yes

26. Vocaloid

ok, now let's move on to turning an equation into a graph the problem gives you the equation y = 3x which means that we can pick any number to be x, and get a matching y value by multiplying 3*x so, if x = 0, then y = ?

27. anonymous

0?

28. anonymous

3(0)

29. anonymous

@Vocaloid

30. Vocaloid

right, y = 0 when x = 0 remember how we write a point? we can write x = 0 and y = 0 as (0,0) and graph this point

31. Vocaloid

next, we can pick another x value, let's just go with x = 1 as an example when x = 1, y = ?

32. anonymous

@Vocaloid

33. Vocaloid

yeah?

34. Vocaloid

when x = 1, y = ?

35. anonymous

idk why it did that. It glitched and sent it again >.<

36. anonymous

3(1)

37. Vocaloid

right, and 3 times 1 = ?

38. anonymous

3*

39. Vocaloid

right, so y = 3 when x = 1 we can write this as (1,3). so we have two points now, (0,0) and (1,3). draw these two points on a graph, then draw a straight line through them, like so:

40. Vocaloid

|dw:1440018952660:dw|

41. anonymous

oh

42. Vocaloid

does that make a bit more sense now?

43. anonymous

Why those numbers?

44. Vocaloid

@theforgottendogs remember when we solved the equations? x = 0, y = 0 x = 1, y = 3 and we made the two points (0,0) and (1,3)?

45. Vocaloid

I just picked x = 0 and x = 1 because they were easy to calculate, you can pick any 2 x values you want