Question

@asnaseer @SolomonZelman @xGuardians @Hero

Answer 1

Can you explain this? DO NOT GIVE ME AN ANSWER!

What is the equation of the line that passes through the points (0, 4) and (−3, 0)?
A. y = 4/3 x + 4
B. y = −3/4 x − 3
C. y = 3/4 x + 4
D. y = 4/3 x − 3

Answer 2

you already have your y-intercept so you can eliminate 2 of the answer choices.

Answer 3

^Pretty good hint. You actually happen to have the x-intercept and the y-intercept.

Answer 4

I thought is was B but I'm not sure if that's right.

Answer 5

You are given two points on a line which means both points will work for only one of them. Plug the points in to each equation to find out which one works for both.

Answer 6

-3 and 4 is in B...

Answer 7

There are at least two ways to figure out what the points are.

1. Solve algebraically by checking the points or
2. Solve graphically by graphing both points and drawing the line through them and finding the equation of the line.

The question is, which method are you going to use to do it?

Answer 8

OK; I'm going to assume it's not B, since you haven't told me if I was right or not. Hold on and let me see if I can figure it out...

Answer 9

Whatever you do, please show your steps. If you need help, ask.

Answer 10

HINT: (x,y)
You have :(0,4)
In Equations: y = mx + b
y = equation of line
m = slope
x = a value unknown
b = y intercept.

Hope this helps you eliminate those two!

Answer 11

@Hero Can you walk me through the steps to do #2

Answer 12

@sweetburger which ones do i eliminate? and why?

Answer 13

alright y=(slope/m)x+(y-intercept) according to the points we were given we have the point with the y-intercept which is (0,4) so we can eliminate the equations that dont look like this
y=mx+4

Answer 14

slope/m doesnt mean slope divided by m just saying that m is another way of saying slope

Answer 15

So it's a or c

Answer 16

considering your given 2 points you can also find the slope of the line using this formula
\[M=(y2-y1)/(x2-x1)\]

Answer 17

it's x,y right not y,x

Answer 18

yes @CrazyCountryGirl it is either a or c

Answer 19

OK @sweetburger Is it X,Y or Y,X?

Answer 20

(x,y)

Answer 21

x=independent variable y= dependent variable

Answer 22

So 4/3 A? @sweetburger

Answer 23

@sweetburger @Hero Am I right? Is it A?

Answer 24

Yes @CrazyCountryGirl you are correct :)

Answer 25

Yay!!!

Answer 26

I get it!!

Answer 27

A is correct, but I'm still wondering how @CrazyCountryGirl arrived at A as the correct result. You don't really know it for sure unless you can fully explain your steps.

Answer 28

OK. I used the formula. I'm not retyping it because I really don't wanna. :)
1. 4-0=4 I did that because (Y2-Y1)
2. 0-(-3)=3 I did that because (X2-X1)
3. So that is how I came to the conclusion 4/3 because we had already crossed out B and D.

Answer 29

Finding the slope of the line is only part of the solution. But finding it allows you to eliminate B and C. Explain how you eliminated D as a possible choice.

Answer 30

I already had my Y intercept.