Answer
a. See Graph Below
b. -0.5
c. -0.5
Work Step by Step
a. See Graph Below
b. $g(x) = 3- 0.5x$
Slope = m, from $y = mx + b$
$m = -0.5$, so slope = -0.5
c. In a linear function, the rate of change is the slope of the function.
Thus it is also -0.5