Answer:
The equation in slope-intercept form of required line is: 
Step-by-step explanation:
We need to write equation in slope-intercept form to represent the relationship on the graph.
The general equation in slope-intercept form is: 
Where m is slope and b is y-intercept
Finding slope using formula: 
Looking at he graph we have
x_1=0, y_1=2, x_2=1, y_2=1
Putting values in formula and finding slope:

So, we get slope m = -1
Using slope m=-1 and point (0,2) we can find y-intercept

So, y-intercept b = 2
The equation of line having m=-1 and b=2 will be:

The equation in slope-intercept form of required line is: 