Chapter 3 - Linear and Quadratic Functions - 3.1 Properties of Linear Functions and Linear Models - 3.1 Assess Your Understanding - Page 126: 8

positive

If $m$, the slope of the graph is positive of a linear function then the function is increasing over the domain of the function. This is because if $m\gt0$ and $x_0\gt0$ then $mx+b\lt m(x+x_0)+b$, hence the value of the function increases.