Answer: C
Step-by-step explanation:
Slope formula = y2 - y1/x2 - x1
Take two points -> (28, -7) & (14, 0)
0 - (-7)/14 - 28 = 7/-14 = -1/2 = m
Take any point from the graph and plug-in -> (14, 0)
y = mx + b
0 = -1/2(14) + b
7 = b
Final Answer: y = -1/2x + 7