Question

Write an equation for the line that passes through (2,4) and (-1,4).

Answer 1

find its slope m by (y - y)/(x - x)
then substitute y = m x + b, find b
then done

Answer 2

would the equation be y=0x+3?

Answer 3

yes, slope 0 is correct, but b is wrong, how did you get b = 3?

Answer 4

guessed

Answer 5

y = 0x + b, so we substitute the (2, 4) into this, x= 2, y = 4

4 = 0*2 + b
4 = 0 + b
4 = b

Answer 6

so, then the equation is y=4

Answer 7

yes

Answer 8

how would you figure out b for this problem: (0,5) and (1,3)?

Answer 9

so, far i have y=1x+b

Answer 10

wops

(5-3)/(0-1) = 2 / (-1) = -2
slope would be -2

Answer 11

y=-2+5?

Answer 12

y = -2x + 5

Answer 13

how would you figure out b for this problem: (0,-1) and (2,3)?
This is what I did: (3-(-1)/(2-0)=4/2: =2x
-1=2 (0)+b
-1=0+b
-1=b
Equation= 2x+-1

Answer 14

yup y = 2x - 1

Answer 15

How would you check your work to see if your right?

Answer 16

you substitute the other point in
y = 2x - 1
substitute (2, 3)

Answer 17

how would you figure out b for this problem: (0,0) and (2,3)?
This is what I did: (3-0)/(2-0)=3/2= 1 1/2
what do you do next?

Answer 18

3/2 x + b = y
stubstitute 0,0
0 + b = 0
b = 0