If (3,b) is a point on the graph of y = 2x+9, what is​ b?

Answer 1

Ordered pairs are (x, y) so x = 3 and y = b

Using the equation y = 2x + 9, and plugging in x = 3 and y = b we get:

y = 2x + 9

b = 2(3) + 9

b = 6 + 9

b = 15