Question

Can someone please help me with coordinate algebra??

Answer 1

sure I can try :)

Answer 2

There are 4 leaves along 3 inches of an ivy vine. There are 20 leaves along 15 inches of the same vine. Which equation models the y number of leaves along x inches of vine?
A) y = -x + 3
B) y = 1/4x
C) y = 3x + 4
D) y = 4/3x

Answer 3

@satellite73

Answer 4

@Frazfootballa

Answer 5

@Godlovesme

Answer 6

hang on

Answer 7

Okay, thank you for helping me :)

Answer 8

np and first u have to find the slope in order to write an equation do u know the formula to find a slope? :)

Answer 9

k so we know that y represents number of leaves and x represents inches of vine right?
do u know hot to set up an ordered pair? sorry if i'm asking too many questions :/

Answer 10

Yes, slope is m = y2 - y1/ x2 - x1

Answer 11

great so we can create an ordered pair of (15,20) and (3,4) u got that @Answers101

Answer 12

Yes..

Answer 13

nice! :D m=20-4/15-3= 16/12= 4/3
do u kno how to find a y-intercept? :)

Answer 14

y = mx + b

Answer 15

ok there is a point-slope intercept form y-y1= m(x-x1) y1 is either 4 and 20, m is 4/3, and x1 is either 15 or 3 can u plug the given info and try to work out? :)

Answer 16

Yes, one sec.

Answer 17

k

Answer 18

I got 16/12. I'm confused.

Answer 19

that's the slope lets work it out together
i'll use (15,20)
so, y-20=4/3(x-15)
y-20=4/3x- 20
y-20+20= 4/3x-20+20
y=4/3x make sense?

Answer 20

Kinda, yeah.

Answer 21

Could you help me with a few more?

Answer 22

sure :)

Answer 23

There are 56 blades of grass in 1 in^2 of lawn. There are 230 blades of grass in 4 in^2 of the same lawn. Which equation models the y blades of grass found in x in^2 of lawn?
A) y = 58x + 2
B) y = -58x + 2
C) y = 58x - 2
D) y = -58x - 2

Answer 24

x--> in^2
y--> blades of graph
so can u make ordered pairs?

Answer 25

x = 1 in^2
y = 56
?

Answer 26

yeah (1,56) and (4,230) can u find slope?

Answer 27

174/3 ?

Answer 28

right which reduces to 58 then we plug our info to the point-slope formula
y-y1= m(x-x1) I'll use (1,56)
y-56= 58(x-1)
y-56=58x-58
y-56+56= 58x-58+56
y=58x-2 :)

Answer 29

@Answers101

Answer 30

Okay, thank you.

Answer 31

Could you help with a few more?

Answer 32

sure what is it?

Answer 33

A spring stretches to 18 cm with a 70 g weight attached to the end. With a 100 g weight attached, it stretches to 24 cm. Which equation models the distance y the spring stretches with weight x attached to it?
A) y = -1/5x + 4
B) y = 1/5x - 4
C) y = -1/5x - 4
D) y = 1/5x + 4

Answer 34

can u do me favor and try this one by ur own? and i'll help u if u get stuck :)

Answer 35

Would X be (18,70) & Y- (24,100) ?

Answer 36

100-70/ 24-18 = 30/6 = 5
Is that correct?

Answer 37

the steps r correct but the weight attached is represented as x and the distance it stretches as y can u check ur ordered pairs please :)

Answer 38

Yes, I'll be right back.

Answer 39

:D

Answer 40

I'm not sure..

Answer 41

I did the calculations but it doesn't add up to one of the answer choices.

Answer 42

@Godlovesme

Answer 43

k its m=24-18/100-70= 6/30 =1/5 confusing? :)

Answer 44

No, not that way..

Answer 45

gud
y-24= 1/5(x-100)
y-24=1/5x- 100/5
y-24+24=1/5x-20+24
y=1/5x+4 :D

Answer 46

Thank you.

Answer 47

my pleasure!! thanks for the medal gtg anytime u need help just tag me I'll do my best :D

Answer 48

Could you help with 1 more?

Answer 49

A student can type 174 words in 3 minutes & 348 works in 6 minutes. How many words can the student type in 8 minutes?
A) 378 words
B) 464 words
C) 484 words
D) 524 words

Answer 50

I got it, its B

Answer 51

YES!!! u r awesome nice job 1!

Answer 52

A candle is 7 inches tall after burning for 1 hour. The same candle is 5 1/2 inches tall after burning for 4 hours. How tall will the candle be after burning for 6 hours?
A) 4 1/2 in
B) 4 in
C) 3 1/2 in
D) 3 in

Answer 53

I know B is eliminated

Answer 54

give me a sec :)

Answer 55

I really really appreciate your help! :)

Answer 56

m=4-1/5.5-7= 3/-1.5 = -2
y=mx+b
7=-2(1)+b
7+2=-2+2+b
9=b
so our eqn is y=-2x+9
6-9=-2x+9-9
-3/-2= -2x/-2
x=3/2
srry this isn't one of the choices I apologize for wasting ur time =0

Answer 57

No, you haven't wasted my time. What do you think the answer is?

Answer 58

@Godlovesme