anonymous
  • anonymous
I Will Medal And Fan! I need explanation AND answer! hold on.. let me put the graph up
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
|dw:1440015007670:dw|
anonymous
  • anonymous
don't judge, that took me ages
Vocaloid
  • 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 = ?

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anonymous
  • anonymous
i don't get x ^ 3 = ? what is ^
Vocaloid
  • Vocaloid
^ means exponent so y = x^3 = x*x*x
Vocaloid
  • Vocaloid
I presume that your equation looks like this? |dw:1440016180277:dw|
anonymous
  • anonymous
it looks like |dw:1440016208739:dw|
Vocaloid
  • Vocaloid
oh, ok, then let's go with that if x = 0, then y = 3x = ?
anonymous
  • anonymous
y = 3x is the part I don't get
anonymous
  • anonymous
3(0)
Vocaloid
  • 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
Vocaloid
  • Vocaloid
yes, y = 3(0) = 0 when x = 0 this gives us the point (0,0)
Vocaloid
  • Vocaloid
now, when x = 1, y = 3x = ?
anonymous
  • anonymous
3(1)
Vocaloid
  • Vocaloid
right, and 3(1) = 3, correct? this gives us the point (1,3)
Vocaloid
  • Vocaloid
now, let's put (0,0) and (1,3) on your graph:
Vocaloid
  • Vocaloid
|dw:1440016450097:dw|
Vocaloid
  • Vocaloid
now we draw a straight line through the two points, and then we have our line.|dw:1440016477564:dw|
Vocaloid
  • Vocaloid
is that clear?
anonymous
  • anonymous
Not quite. sorry it took me awhile, my dogs were fighting
Vocaloid
  • Vocaloid
well, let's go from the top do you understand how to graph points?
Vocaloid
  • Vocaloid
for example, if I told you to put the point (3,5) on a graph, could you do it?
anonymous
  • anonymous
yes
Vocaloid
  • 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?
anonymous
  • anonymous
yes
Vocaloid
  • 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 = ?
anonymous
  • anonymous
0?
anonymous
  • anonymous
3(0)
anonymous
  • anonymous
@Vocaloid
Vocaloid
  • 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
Vocaloid
  • Vocaloid
next, we can pick another x value, let's just go with x = 1 as an example when x = 1, y = ?
anonymous
  • anonymous
@Vocaloid
Vocaloid
  • Vocaloid
yeah?
Vocaloid
  • Vocaloid
when x = 1, y = ?
anonymous
  • anonymous
idk why it did that. It glitched and sent it again >.<
anonymous
  • anonymous
3(1)
Vocaloid
  • Vocaloid
right, and 3 times 1 = ?
anonymous
  • anonymous
3*
Vocaloid
  • 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:
Vocaloid
  • Vocaloid
|dw:1440018952660:dw|
anonymous
  • anonymous
oh
Vocaloid
  • Vocaloid
does that make a bit more sense now?
anonymous
  • anonymous
Why those numbers?
Vocaloid
  • 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)?
Vocaloid
  • Vocaloid
I just picked x = 0 and x = 1 because they were easy to calculate, you can pick any 2 x values you want

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