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Sloan [31]
3 years ago
14

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=

Mathematics
2 answers:
PolarNik [594]3 years ago
6 0

Answer:

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

djverab [1.8K]3 years ago
4 0

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

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