Question

Vertex of (1,5) and passes through (2,1). What is the equation in vertex form

Answer 1

Slope Formula:


`a= (\Delta y)/(\Delta x) \\ a= (5-1)/(1-2) \\ a=-4`

b-value:


`y=ax+b \\ 5=(-4)* 1+b \\ b=9`

Function:


`\boxed {f(x)=-4x+9}`