Need help ASAP PLEASE SHOW WORK ITS DUE SOON

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

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.

Solve 3x-18=2y and 5x-6y=6 by elimination show work