Answer: 40 inches
Explanation-
Step 1: Turn this into an equation
We know that the equation will be in y=mx+b We also know that the rate/slope (m) is 4. We now know that the equation is y=4x. Since there is no mention of an intercept (b), we can assume that it is 0. So our equation will end at y=4x
Step 2: Substituting the “x” value
Since “x” represents the seconds, we can substitute that for 10. The equation now turns into y=4(10)
Step 3: Solving
By multiplying the numbers in the equation, we can now get the final result. y= 4(10) y=40
Step 4: Final answer
Since y=40, the depth is 40 inches
Hope this helps :)