Point Slope Form Question ?

Question

Given the point (1, 2) and (3, 2) write the equation of the line. Slope -intercept form.

Answer 1

y - 2 = (2-2)(x-1)/(1-3)

       = 0

y = 2  The slope is zero and the intercept is 2

Answer 2

the equation for this is y=mx+b

the m stands for slope and the b stands for y intercept

since the 2 points make a horizontal straight line, then the slope is 0.

and the y intercept is 2.

so you just plug in the numbers and the equation is...

y = 0x + 2

but since zero times x is zero you can take out the 0x.

so you get for your final equation...

y = 2.

and that leads back to the graph b/c if you have a horizontal line then you will have y = ???

for the equation.

and if the line is perfectly vertical it is undefined.

and the equation for that is x = ???

i know you dont need that last part. but now you can be ahead of the class. :)

but if it confuses you just ignore it.

good luck with math!

Answer 3

y-y1=m(x-x1)

(2-2)=(3/0=0)(3-2)

0=0

Answer 4

y = 2. Always y= or x= if there are two of the same coordinate on the graph.

Answer 5

The line has no slope

slope intercept form : y= 1

Answer 6

it is a horizontal line graph....in y=mx+b form it would come out to be

y= 0x+2(because m is slope, and horizontal lines dont slant)...then your would simplify it and have just plain old y=2....so if x=3 y=2 (3,2) if x=1 then y=2 (1,2)