In any given function, when the x value increases and the y value increases, the slope of this function is considered to be what

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

At which value in the domain does f(x) =0?

If f(x)= 3x+6 which of the following is the inverse of f(x)