Question

What is the equation of the line in slope-intercept form? the line parallel to y = –8x – 3 through (–1, 4)

Answer 1

what do parallel lines have in common?

Answer 2

y intercept

Answer 3

?

Answer 4

no, they share the same slope

Answer 5

oh ok

Answer 6

so if the equation of one line is y = –8x – 3, what's the slope of the other line?

Answer 7

8

Answer 8

-8. the - matters :)

Answer 9

do you know what point-slope form is? because i'd recommend putting the info in point-slope form first

Answer 10

y=mx+b

Answer 11

y = mx + b is slope-intercept form, not point-slope. point-slope is y - y1 = m(x - x1)

Answer 12

PARALLEL lines have same slope
PERPENDICULAR lines, you find reciprocal( 3/4's reciprocal would be 4/3) and switch the sign (+ or - depending)

Answer 13

ok

Answer 14

yea, the two lines are parallel lol.

Answer 15

so they have the same slope...

Answer 16

anyway, in y - y1 = m(x - x1) you just have to put in your given information which is: y1 = 4, x1 = -1, and m = -8

Answer 17

ooh ok i confused point slope and slope intercept form

Answer 18

that's ok :) it happens to me to sometimes lol. what do you get after putting the info in?

Answer 19

too*

Answer 20

y-4=-8(x+1)

Answer 21

becuz x-(-1) = X+1

Answer 22

that's right :D do you know how to change it into slope-intercept form after that?

Answer 23

not sure how to

Answer 24

alright, we have y - 4 = -8(x + 1) and slope-intercept form is y = mx + b. to change it into slope-intercept, you have to distribute that -8 into the parentheses, then abb 4 to both sides

Answer 25

add* :l

Answer 26

so y=-8x-4

Answer 27

yup :)

Answer 28

thanks

Answer 29

no problemo