What is the standard form for the quadratic function? f( x ) = ( x − 3 )^2 + 5 f( x ) = x^2 +6x −4 f( x ) = x^2 −6x + 14 f( x ) = x^2 + 14 f( x ) = x^2 − 4 !

Cherie works in retail and her weekly salary includes commission for the amount she sells. the equation s=400+0.15c models the relation between her weekly salary, s, in dollars and the amount of her sales, c, in dollars. interpret the slope of the equation.