Answer:
B
Step-by-step explanation:
recall the general form of a linear equation is
y = mx + b
where m is the slope (or rate of change) and b is the y-intercept (or the initial value of y when x = 0)
let y = water level and x = time elapsed
In this case, we are given that the rate of change is 0.75 in/min, given that the water level is RISING and the equation describes the INCREASING of water depth, hence the sign the rate is a positive (increasing) rate.
hence m = +0.75 in/min
also given that the initial level is 1 inch, hence b = 1 inch
substituting these values into the general equation:
y = 0.75x + 1 (answer B)
