Question

]Choose the equation of the horizontal line that passes through the point (-8, -7)

Answer 1

for any horizontal line, always y=constant, so y=-7

Answer 2

draw a horizontal line through (-8, -7)

you'll notice that any point on this line will have a y coordinate of -7

so that's another way to see that the answer is y = -7

Answer 3

Choose the equation below that represents the line passing through the point (2, -4) with a slope of 1/2

Answer 4

@jim_thompson5910

Answer 5

start with y = mx + b

then plug in the slope to get y = (1/2)x + b

after that, plug in the given point to get -4 = (1/2)*(2) + b

now solve for b

Answer 6

i dont know how @jim_thompson5910

Answer 7

-4 = (1/2)*(2) + b

-4 = (1/2)*(2/1) + b

-4 = (1*2)/(2*1) + b

-4 = 2/2 + b

-4 = 1 + b

...
...
...

b = ???

Answer 8

-3

Answer 9

@jim_thompson5910

Answer 10

no

Answer 11

keep in mind you're subtracting 1 from both sides

Answer 12

and -4-1 is NOT -3

Answer 13

im lost @jim_thompson5910

Answer 14

think about it like this

-4 means you're 4 dollars in debt

then you spend one more dollar

how many dollars in debt are you now?

Answer 15

-5

Answer 16

so -4-1 = -5

Answer 17

which means b = -5

Answer 18

m = 1/2
b = -5

Answer 19

Write the equation of the line in slope-intercept form with a slope of 3 and a y-intercept of -2 ?

Answer 20

\[\large y = mx+b\]

\[\large y = \frac{1}{2}x - 5\]

Answer 21

same thing, now m = 3 and b = -2

Answer 22

last one

Answer 23

m = slope
b = y-intercept

Answer 24

now what ?

Answer 25

slope of 3 and a y-intercept of -2 ---> m = 3 and b = -2

Answer 26

I'm sure you see what to do from here

Answer 27

-2=3x+-2

Answer 28

@jim_thompson5910

Answer 29

you leave y as it is

Answer 30

so it's just y = 3x - 2

Answer 31

]Identify the correct x intercept and y intercept of the equation x + 7y = -21 @jim_thompson5910

Answer 32

hmm you said it was the last one

Answer 33

anyways, plug in x = 0 and solve for y to get the y-intercept

plug in y = 0 and solve for x to get the x-intercept

Answer 34

how ? @jim_thompson5910

Answer 35

when you plug in x = 0, you're basically replacing x with 0

Answer 36

then you solve for y

Answer 37

idk how

Answer 38

you've never solved equations?

Answer 39

no

Answer 40

ok one sec

Answer 41

I recommend checking out this page

http://www.purplemath.com/modules/solvelin.htm

Answer 42

keep in mind that there are multiple pages

and try out the examples as well

Answer 43

i will but can you please just give me this last answer ? i need a good grade on this assignment

Answer 44

sorry can't just hand out answers (it's against the rules on this site)

Answer 45

have a look at that page

Answer 46

:/ explain it to me then ? @jim_thompson5910

Answer 47

is the page not helping at all?

Answer 48

it should explain how to solve linear equations