Question

Please help

Answer 1

How can we help you?

Answer 2

could someone walk me thought this i know mostly how to do it i just need to make sure i'm doing it right

Answer 3

so you would do

5-2 and 480-225 right

Answer 4

A: we are given two points (2, 225) and (5, 480) where x represents number of days and y represents cost.
ASSUMING a linear relation, we obtain the equation y = 85x + 55 via an equation of choice

Answer 5

Yes

Answer 6

255/3

Answer 7

B follows immediately if you let y be a function of x

Answer 8

? and how did you get y = 85x + 55

Answer 9

via two-point form:
\[y-225=\frac{480-225}{5-2}(x-2)\]

Answer 10

@LollyLau ok i see what you did but I never done it that way before

i always been tough you take you x and your y and subtract you y and subtract your for your x and your y for your y

like this 5-2 480-225 then you dived the number so 3/255 which is 85

did i do it right so he would have to pay 85 dollars for x days

Answer 11

$85x for x days, plus a base charge.

Answer 12

how do i find the base charge

Answer 13

Please help @LollyLau

Answer 14

y-intercept

Answer 15

how can i find that

Answer 16

@LollyLau

Answer 17

y = mx + c
c is the y-intercept i.e. when x is 0

Answer 18

i know that but i forget how you find C

Answer 19

Substitute x = 0.

Answer 20

so84 x 0 =c ?

Answer 21

Substitute x = 0, the resulting y will be the y-intercept.

Answer 22

I still don't get it sorry

Answer 23

y = 85x + 55
When x = 0,
y = 85(0) + 55
y = 55

Answer 24

but where did the 55 come from

Answer 25

From the equation previously obtained.

Answer 26

i'm sorry but i'm just not getting it

Answer 27

Remember I did a two-point form before?

Answer 28

yes but you had 3 and 255 so how did you get 55

i get you got the 85 by 3/255

Answer 29

sorry 255/3

Answer 30

I have to go i will fan you and if you are on here when i come back i will need your help

Answer 31

Alright cheers