The table below shows Japan's exchange rate and the volume of auto exports

X: Annual exchange rate (Japanese yen/US dollar)

Y: Number of automobiles exported (10,000 units)

(1) Draw a scatter diagram of the relationship between X and Y.

(3) The model obtained by fitting linear regression equation is =81.72+3.65X，t=(1.2427) (7.2797)，R²=0.8688，F=52.99

Explain the economic significance of the parameter.