Question

If I have an ordered pair (4,12)<--Like This
How would I determine an equation for it?? An equation like y=3x

Answer 1

you need another point

Answer 2

y = 3x is a line...and two points determine a line...so you need another point..make sense?

Answer 3

Well, I'm stuck on a question that is asking me what equation would be appropriate for the ordered pair (4,12)

Answer 4

what's the whole question?

Answer 5

Screen shot of my algebra 1 prep cd

Answer 6

well that question is a different thing

Answer 7

to know which one (4,6) is a solution to you have to substitute one by one into the equations (4, 6)

Answer 8

the y or the x?

Answer 9

for example... the given ordered pair is (4,12)

let's check if (4,12) is a solution to y = 1/6 x

substitute y = 12 and x = 4

12 = 1/6 (4)
12 = 4/6
12 = 2/3

his is not true...therefore (4,12) is not a solution to y = 1/6 x

got it?

Answer 10

Yes, that's perfect!

Answer 11

Okay so now I have a different question

Answer 12

sure

Answer 13

Some questions I see require me to make an equation for the plots on a graph
how do you do that?

Answer 14

Or they ask that I match the plots to the correct equation(s) Because sometimes there are more then one that can work

Answer 15

you mean create an equation out of a graph?

Answer 16

you know x-intercepts and y-intercepts right?

Answer 17

I have a little trouble with finding x-intercepts

Answer 18

they are the point where the graph crosses the x-axis

Answer 19

that's the x-intercept