Question

find an equation for a line that goes through (1,8) and (-1,-2)

Answer 1

first you find the slope

Answer 2

once you find the slop use this formula and put your slope where th m is on this formula y = mx + b

Answer 3

now take either (1, 8) or (-1, -2) and plug in the values of x and y

Answer 4

remember the answer you get cause you will still need it

Answer 5

you should be able to figure the rest out

Answer 6

ill provide an example i found that is easy to understand

Answer 7

ok so your to points for example are (5,13) and (8,19)

first you find the slope:

(19 - 13) / (8 - 5) = 6 / 3 = 2

SLOPE = 2, remember that.

now write down:

y = mx + b

use the slope we found:

y = 2x + b

***now take either (5, 13) or (8, 19) and plug in the values of x and y***

we'll use (5, 13):

y = 2x + b

13 = 2(5) + b

13 = 10 + b

b = 3


we have now found: slope = 2 and b = 3

so we write down y = mx + b again, and plug in for the info we found.

y = mx + b

y = 2x + 3 <--- answer

Answer 8

use that example to figure out your answer