To write the equation of a line in slope-intercept form, we use the formula:
y = mx + b
Here, m represents the slope and b represents the y-intercept.
Given that the slope m is 1 and the y-intercept b is 4, we can substitute these values into the formula:
y = 1x + 4
This simplifies to:
y = x + 4
Thus, the equation of the line with a slope of 1 and a y-intercept of 4 is y = x + 4.