Bradley is returning home from a place that is 2 kilometers away. The function y = 2,000 − 90x represents Bradley's distance from home in meters, y, in relation to the number of minutes he walks, x. Which statements about this function are true? The function is a linear function. The function is a nonlinear function. The function does not change at a constant rate. The function is an increasing function. The function changes at a constant rate.