We have
the next equation

First, we need to know the slope-intercept form

where m is the slope and b is the y-intercept
so we need to clear y of the equation given

where
the slope is -3/2
the point of the y-intercept is (0,6)
the point of the x-intercept is (4,0)
using the formula of the slope

as we can see we found the same value
the graph is