Question

Find the vertex. f(x) = 9x2 + 1​

Answer 1

vertex = (0, 1 )

Explanation:

f(x) = 9x² + 1 ← has it's vertex on the y- axis

let x = 0 in f(x)

f(0) = 9(0)² + 1 = 0 + 1 = 1

vertex = (0, 1 )