Answer:
The correct option is c.
Step-by-step explanation:
The slope intercept of the function is
[tex]y=mx+b[/tex]
where, m is slope and b is y-intercept of the line.
It is given that the floor number of an elevator descending at a steady rate. It means the value of m must be negative.
In option a and d the value of m is 2 which is a positive number. Therefore option a is and d are incorrect.
y represents the floor number and x represents the time. So, y-intercept represents the number of floor at initial stage.
The number of floor can not be a number, so the value of b must be positive.
In option b the value of b is -75 which is a negative number. Therefore option b is incorrect.
In option c the value of m is -2 which is a negative and b is 75 which is a positive number. Therefore option c is correct.
