Find two convenient points -3,1 and 3,3 compute slope, m = (y1-y2) / (x1-x2)
this is 'm' in your slope intercept form of a line y = m x + b
'b' is the y-axis intercept of the line (this occurs when x = 0) ....from the graph this value is '1'
so your line will be y = m x +1 (put in your computed value of 'm' )