Answer:
The slope IS NOT 3.
So the statement is FALSE.
Explanation:
y = mx + b
If we change the graph shown into the format shown above it would be:
y = 1x - 3
mx = slope
Slope = 1x
b = y-intercept
b = -3
To find the slope you must do:

y = rise
x = run
In the graph shown, the points are going up and shift to the right 1 unit.
So the slope is: 1x
Therefore, the statement, "The slope is 3" is actually false.