The following graph shows the relationship established by a car dealership between the sale price of a particular car model and the age of the car. write the equation for the line of best fit shown on the graph. y=

y = -2444.4444x+19000

Step-by-step explanation:

Pick two points along the line to find the slope

(0, 19000) and (4.5, 8000)

slope = (y2-y1)/(x2-x1)

        = (8000-19000)/(4.5-0)

         =-11000/4.5

           = -2444.44444444

We know the y intercept (where it crosses the y axis  (x=0))  (0, 19000)

We can write an equation using y = mx+b

y = -2444.4444x+19000

Using 2 points: (0,19,000) and (3.25, 11,000)

First find the slope by putting the change in Y over the change in X:

Slope = ( 19000 - 11000) / (0 - 3.25)

Slope = -2462.54

The Y intercept is the 1st Y value = 19,000

The equation becomes: y = -2461.54x + 19000

check the picture below.

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540