Luigi is an urban planner. as an independent contractor, he charges $140 fee plus $ 25 per hour for each contract with the city. write a function to represent this scenario where y represents the total amount her changes for a project and x represents the number of hours worked on a project

x = hours 25 per hour = 25x

y = total

 so y = 25x +140

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

answer: okw

step-by-step explanation: