To find the slope of a graphed line, use rise/run. Count how many units you have to rise and run to get to from one point to the other. Up and right means positive slope, down and left means negative slope.
So from (-4,-2) to (2,2).
Now count how many units you're going up and right.
I counted 4 up and 2 right. So the slope is 4/2 or can be simplified to 2/1 or 2.
If you have to find the slope intercept equation, all you're missing is b, the y-intercept. You can find the y-intercept by looking at where the line crosses the y-axis, which in this problem is 6.
The slope intercept formula is y=mx+b
m is the slope, and b is the y-intercept.
So if you put the slope and the y-intercept in the equation, the slope intercept for this graph is:
y=2x+6
Hope this helped!