2.23606797749979
or round it to 2.2
You should put 4 as x, -3 as y and a as slope to make an equation :

then you can find the slope and the correct equation of the line :
the slope is :

so the equation of the line will be

D is true
hope this helps
Get her done ...........................
Answer:
x= 120
Step-by-step explanation:
x+60=180
x=180-60
x=120