answersLogoWhite

0

finding the equation of a line of (-1,2) and (1,2):

formula:

y=mx+b

m = slope

b = y intercept

first find m: m=(y2-y1)/(x2-x1)

so, m=(2-2)/ (1- -1)

m=0

since you now know m you can plug that in to the formula:

y=0x+b

to get b:

plug in the coordinates (either (-1,2) or (1,2)), it comes out the same

(-1,2). y=mx+b or 2=0 × -1+b, ==>solving for b: b=2-(0)(-1). b=2

(1,2). y=mx+b or 2=0 × 1+b, ==>solving for b: b=2-(0)(1). b=2

you now know that m=0 and b=2, now plug that back in the equation to get:

y=mx+b

y=0x+2

y+2

It's confusing, but it works!

User Avatar

Wiki User

14y ago

Still curious? Ask our experts.

Chat with our AI personalities

SteveSteve
Knowledge is a journey, you know? We'll get there.
Chat with Steve
DevinDevin
I've poured enough drinks to know that people don't always want advice—they just want to talk.
Chat with Devin
FranFran
I've made my fair share of mistakes, and if I can help you avoid a few, I'd sure like to try.
Chat with Fran
More answers

It depends on what type of equation you are graphing. It is also important to know what form the function is in, whether it is standard or intercept, etc.

y=mx+b
The y-intercept is b, and mark the next point depending on the slope.

y=ax2+bx+c
Either factor it into (x-h)(x-k) or use the quadratic formula.

y=a(x-h)2+k
Point (h,k) will be the vertex and line of symmetry

Those are a few of many ways of graphing an equation. You may also randomly plug in easy x values of a y.
Or you can use a graphing calculator if your trying for a D-

User Avatar

Wiki User

15y ago
User Avatar

Add your answer:

Earn +20 pts
Q: How do you make a graph from an equation?
Write your answer...
Submit
Still have questions?
magnify glass
imp