Question

The length of the completed tunnel can be calculated using the equation . If the project will be completed 86 days after the TBM was introduced, the length of the completed tunnel will be feet.

Answer 1

The y - intercept of an equation is the value of y when x is substituted with zero. From the given equation,
y = 25x + 225
Substituting,
y = (25)(0) + 225
y = 225
Thus, the y - intercept of the given equation is 225.