Question

please help :)

Answer 1

@dalia_lam

Answer 2

I think it's C, because the slope of the graph is -4

Answer 3

thank for the answer @dalia_lam :D

Answer 4

rate of change is the change in y/ corresponding change in x
y2 -y1 / x2 - x1 where you have points (x1,y1) and (x2, y2)

Answer 5

thank you both @dalia_lam & @triciaal :)

Answer 6

I got another question @dalia_lam & @triciaal :)

Answer 7

post it

Answer 8

sure :)

Answer 9

one approach
y = mx + b
choose any 2
630 = m(45) + b
390 =m(15 + b
you have 2 eqn 2 unknown
subtract
630-390 = 45m-15m =30 m
240/30 = 8

Answer 10

(15,390) (30,510)
510-390=120
30-15=15
120/15=8 =>slope

y=8x+b
630=8(45)+b
630=360+b
270=b

y=8x+270

Answer 11

thanks for the equation :) now i understand :)

Answer 12

find b the intercept the base price

Answer 13

are you talking to me? @triciaal

Answer 14

It is D

Answer 15

what is the real answer? i'm confused :?

Answer 16

yes 8 is the slope the question is to find the base rental price in the eqn that's the intercept so use one of the eqn and replace m with 8 and find b

Answer 17

so A is the answer?

Answer 18

the answer either way is $270

Answer 19

okay the answer is D, thanks both @dalia_lam & @triciaal :)

Answer 20

I wish I could medal both of you... :)

Answer 21

ok that's all the question I have :)

Answer 22

the slope is the rate of change = m = 8
the question asked for the intercept b

Answer 23

welcome