Question

if a point (4, 2) lies on the graph of the equation 2 Y = a x + 6 find the value of a

Answer 1

(4,2) satisfy 2y=ax+6

2(2)=a(4)+6

a=-1/2

Answer 2

2y=ax+6 is the graph given
Since (4,2) lies on the graph
Substitute in graph
2(2)=a(4)+6
4-6=4a
-2/4=a
a= -1/2