Compare Functions

Question

Determine if the following functions are increasing or decreasing. A line with y-iintercept (0, 0) which passes through the point (-1, 1)

Answer 1

plot the two points, connect them with a line, notice if it goes up or down hill. it goes downhill, so the function is decreasing

or calculate the slope, if the slope is negative, it's a decreasing function

slope = (1-0)/(-1-0) = 1/-1 = -1. slope <0. slope is negative. It's a decreasing function, as x increasing, y decreases