you should put 4 as x, -3 as y and a as slope to make an equation :
[tex] - 3 = a \times 4[/tex]
then you can find the slope and the correct equation of the line :
the slope is :
[tex] - 3 = 4a \\ a = \frac{ - 3}{4} [/tex]
so the equation of the line will be
[tex]y = \frac{ - 3}{4} x[/tex]
D is true
hope this helps
