Determine whether the table represents a proportional relationship. if a proportional relationship exists, what is the constant ratio of y/x?

a) yes; -2/3
b) yes; -5/3
c) yes; -2/5
d) the table does not represent a proportional relationship

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books

X+y=-4 x-y=2 use elimination with adding and subtraction

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.