The slope is 5/4
To solve this problem we need to find the equation of the line, y=mx+b
We've been given a table with several points, so we can use two of them to perform our calculus.
To obtain the slope we need to use the equation of slopes:
Where (x1,y1) =(4,5) and (x2,y2)=(8,10)
To obtain b we can use the point (x2,y2)=(8,10) in the equation.
10=5/4 *8 +b
Hence our line has the following equation:
how long did the flood last
then i will answer
the 3rd option is right