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=
2 answers:
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
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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Do you mean 3y? If so, 3y = 1/2x + 2
3y - 1/2x = 2 is standard form