What is the slope of the line in the graph below?

What properties allow transformation to be used as a problem solving tool

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?

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.