Rational numbers are Sometimes natural numbers
hope this helps :D
Answer in the document below.
The answer to your question is r=6
A garph y=2 represents a line parallel to the x axis with the y coordinate equal to 2.
The point which lies on the y=2 graph has its y coordinate equal to 2.
In the given options, (3,2) is the coordinate with the y coordinate equal to 2.
Hence, (3,2) lies on the graph of y = 2.
Option (D) is the answer.
The total angle sum of a triangle is 180°
As such, 180= 78 + 2s +4s
102= 6s
s=17