Hello there! 
Y = mx + b 
Looking at the graph we can find our y-intercept, which would be 0,1. 
To find the slope, we can use any two coordinates on the line, such as 
(-1,0) and (0,1). 
Plug it into the slope formula: rise over run. 
1 - 0 / 0 - - 1 = 1/1 
1/1 = 1 
Therefore our slope is 1x. 
Lastly, we just plug the values in for our slope intercept form. 
y = 1x + 1