To find the equation of a line with a y-intercept of -3 and a slope of 18/5 in slope-intercept form, we can use the slope-intercept form of a line, which is:
y = mx + b
where m is the slope of the line and b is the y-intercept.
Substituting the given values, we get:
y = (18/5)x - 3
This is the equation of the line in slope-intercept form. Note that the slope and y-intercept are in their simplest forms, as both 18 and 5 are integers and the fraction 18/5 cannot be simplified further.