Question

In a given linear equation, the value of the independent variable
decreases at a constant rate while the value of the dependent
variable increases at a constant rate. The slope of this line is
(1) positive (3) zero
(2) negative (4) undefined

Answer 1

(2) Negative

Independent variable is on horizontal line (call is X)
Dependent variable is on vertical line (call it Y)
As X increases (moves to the right), Y decreases (moves down).
From mathematical point of view, slope is rise/run. Rise is negative, run is positive. Divide negative number by positive, you get negative.

Hopefully that will make sense :)