f(2) + g(-1) = ??
Using the graph of y = f(x) to find the value of f(2)
the coordinates of each point is ( x , f(x) )
Looking for the point at which x = 2
so, the answer is the point (2 , -2)
so, f(2) = -2
By the same way, we will find the value of g(-1)
looking for the point at which ( x = -1 ) and lie on the graph y = g(x)
so, the point will be (-1 , 3)
so, g(-1) = 3
So, f(2) + g(-1) = -2 + 3 = 1