A 50 million gallon per day (mgd) sanitary water treatment plant was constructed in 1990 at Boston, MA for 150 million dollars. A similar treatment plant with is planned for construction in 2025 in Springfield, MA. The new plant will have a capacity of 30 mgd. Determine the following:A) The estimated cost of the new treatment plant in 1990 dollars. Use Cost Capacity Factor Method and assume p = .75. Assume city-cost indices are: Boston = 115, Springfield = 102. (5) B) The estimated cost of the new treatment plant in 2025 dollars. According to the 2025 projected cost index = 235.6 and the historical cost index for 1990 was 94.3.

  y= -3x is the required function.

step-by-step explanation:

we have been given a table:

x             y

0             0

1             -3

3             -9

-2             6

we can see that the values of y is -3 times the value of x

hence, the function would be: y= -3x.

put the values of x will give the same y as in the table that means function is satisfying the given table.

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.