the answer are...
a. -2
b. -1/2
c. 1/2
d. 2

Answer:
C. 1/2
General Formulas and Concepts:
Pre-Algebra
Algebra I
Step-by-step explanation:
Step 1: Define
Find points from graph.
Point (0, 4)
Point (-8, 0)
Step 2: Find slope m