It would be equal to 1 7/8
Plotting the data to get the line of best fit, it is:
y<span> = 0.087</span>x<span> + 0.587
substitute x=2030-1980=50,
y = $4.94 is the price in 2030</span>
Because they all go into 100 easily. for example 10×10=100 5×20=100
