The line y=x+4 is given in slope-intercept form (y=mx+b) where m is slope and b is the y-intercept.
Parallel lines have the same slope, so we know the line will have a slope of 1. To find the equation of the new line we can plug the slope and given point into the point-slope equation defined as y-k = m(x-h) given point (h,k).
