Points A and B lie on the graph of the equation y=1.4x.
What are the y-coordinates for each point?
Point A: (4,__) Point B: (-6__)

Question

Points A and B lie on the graph of the equation y=1.4x.
What are the y-coordinates for each point?
Point A: (4,__)  Point B: (-6__)

anonymous · Answer

@Peach-es1234

anonymous · Answer

Just a second :)

anonymous · Answer

Point A: (-8,4) Point B: (5,6

anonymous · Answer

im confused how did you get that answer?

anonymous · Answer

I'll explain just a second :)

anonymous · Answer

i'LL BE BACK IN ABOUT 10 MINS OK ,

anonymous · Answer

umm ok :)

anonymous · Answer

attachment

anonymous · Answer

i cant see what u sent me

malcolmmcswain · Answer

Hey @needhelpexplainplz what is it you don't understand?

malcolmmcswain · Answer

You should have mentioned me :P

anonymous · Answer

i need to find out the y-coordinates for the equation at the top and i never noticed you were here :P

malcolmmcswain · Answer

K, so to solve for y, we just plug x into the equation

anonymous · Answer

brb let me work this out

malcolmmcswain · Answer

For A:
y=1.4x
x=4, so
y=1.4 * 4
y=5.6
so, (4,5.6)

malcolmmcswain · Answer

Let's see if you can do B on your own... just use the same steps that I used for A

anonymous · Answer

yea i new it was a decimal but i just didnt know what the numbers were and ok :3

malcolmmcswain · Answer

Idk what Peaches was doing...

anonymous · Answer

is it -8.4?

anonymous · Answer

@malcolmmcswain yea i dont either

malcolmmcswain · Answer

1.4*(-6)=(-8.4)
That's correct!

malcolmmcswain · Answer

So, B is (-6,-8.4)

malcolmmcswain · Answer

Good job! Do you understand now?

anonymous · Answer

yea now is sooper easy :P

anonymous · Answer

can you help me with another?

anonymous · Answer

is a horzontal line on a graph an undefined slope?

malcolmmcswain · Answer

So, here's what a horizontal line would look like:
|dw:1446230814301:dw|

anonymous · Answer

yes...

malcolmmcswain · Answer

Now, an undefined slope has a slope that can't be calculated. Can we calculate the slope of the horizontal line?

anonymous · Answer

nope but cant it also be a zero slope?

malcolmmcswain · Answer

We're getting there... the slope can actually be calculated

malcolmmcswain · Answer

As x gets larger, y doesn't change.

malcolmmcswain · Answer

Which means it has a slope of 0

anonymous · Answer

oh ok so its a zero slope right?

malcolmmcswain · Answer

BUT

malcolmmcswain · Answer

What about the slope of this line?
|dw:1446231067852:dw|

anonymous · Answer

ummm so this one is the undefined slope?

malcolmmcswain · Answer

That slope is undefined, because when we plug in x, we'll usually get undefined. Also, x doesn't increase which makes no sense.

malcolmmcswain · Answer

Got it now?

anonymous · Answer

yup i just forgot which one was what thx  an you help me with another?I'LL open up another Q

anonymous · Answer

@ needhelpexplainplz do you need help some more?

malcolmmcswain · Answer

Sure!