The graph will have a slope of -0.5.
The standard equation of a line is expression y = mx + b
The slope measures the steepness.
Comparing y = -0.5x + 12 with the standard
mx = -0.5x
m = -0.5
Hence the graph will have a slope of -0.5.
Learn more on slope of graph here: https://brainly.com/question/3493733