Question

let a function f be defined on an interval, and let x1 and x2 denote points in that interval. If f (x1) < f (x2) whenever x1 13 years ago

Answer 1

of course the function is an increasing one, check out this graph, we knw f(x1) or the y coordiante of f at x1is less than f(x2) or the y coordinate of f at x2, and we also know x1 is less than x2

Answer 2

thank you :)