PLEASE HELP 2. Find another city whose population starts larger than the city in part (a), but

that during this same time experienced population decline. Determine its

population for January 1st of the same year you picked for part (a). Write an

exponential function to represent the city’s population, y, based on the

number of years that pass, x after a period of population decline. Describe

the variables and numbers that you used in your equation.

y=3x+4

step-by-step explanation:

given the points a(0,4) and b(-4, -8)

eqn of line ab: (y-4)/(x-0)=(-8-4)/(-4-0)

(y-4)/x=-12/-4=3

y=3x+4

the equation of the parabola is y2=12x

explanation:

the vertex is midway between the focus ad the directrix

so, the vertex is (0,0)

let p=(x,y) be a point on the parabola.

the distance of p from the directrix is equal to the distance from the focus.

x+3=√(x−3)2+(y−0)2

(x+3)2=(x−3)2+y2

x2+6x+9=x2−6x+9+y2

y2=12x

graph{y^2=12x [-10, 10, -5, 5]}