Please Help! The graph relates the height of the water in a tank y (in inches) to the volume of the water x (in gallons). A. Is the relationship proportional?

B. Write an equation of the line and interpret the slope.

C. What is the height of the water in the tank when the volume is 250 gallons?

The graph is attached.

Find the arc length parameter along the given curve from the point where tequals=0 by evaluating the integral s(t)equals=integral from 0 to t startabsolutevalue bold v left parenthesis tau right parenthesis endabsolutevalue d tau∫0tv(τ) dτ. then find the length of the indicated portion of the curve r(t)equals=1010cosine tcost iplus+1010sine tsint jplus+88t k, where 0less than or equals≤tless than or equals≤startfraction pi over 3 endfraction π 3.

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document

The anwser cause i do not understand just plez