5.815 equals to 5815\1000
The amount of work done by Kalon in an hour is equal to 1/4. This is based on his time to finish the job. Letting x be the number of hours Marna can finish the job alone will let her finish 1/x of the job in an hour. If their rates are added together and multiplied by the number of hours they worked together, the product should be one whole job.
(1/4 + 1/x)(1 5/7) = 1
The value of x is 3. Therefore, it will take 3 hours for Marna to clean the chimney alone.
The slope is

So, the equation is

The y-intercept is when x=0, so

The answer should and must be Done
_Brainliest if helped!!
since it varies directly, we form an equation ,
Y =kX where k is a constant
use the points given to find K ,
3 =0.2k , k = 15
So to get final answer,
when x = 1
y = kx, = 1(15)
y= 15
Hence when x=1, < y = 15 >