Part A
Find out the slope
we need two points
Looking at the graph
we take (-1,6) and (0,2)
m=(2-6)/(0+1)
m=-4/1
m=-4
The slope is m=-4
Part B
Find out the y-intercept
Looking at the graph
the y-intercept is the point (0,2)
therefore
b=2
Part C
The equation in slope-intercept form is given by
y=-4x+2