Slope means inclination of the line
Intercept means the point where the line crosses the y axis
the general equation for slope intercept is
y = mx + b
where m is the slope, and b is intercept
by visual inspection and comparation of the
general formula y = mx + b
and problem y= -4x + 3
it can be found readily that
Slope m = -4
Intercept b= 3