The equation is y=-5x + 20, x being the hours that go by after 5pm.
(1/2)/6 = 1/12
Each bundle will weigh 1/12 pound, about

ounces.
X=9 mark as brainlest if this helps ;)
A function z=f(x,y) has two partial derivatives and y. These derivatives correspond to each of the independent variables and can be interpreted as instantaneous rates of change (that is, as slopes of a tangent line). Similarly, ∂z/∂y represents the slope of the tangent line parallel to the y-axis.