The graph shows the relationship between the time (in seconds) and number of gallons of water in a sink. The sink starts out with 8 gallons and drains at a constant rate of 35 gallons per second. Which function represents the situation?
A f(x) = 3/5x+8
B f(x)= 3/5x-8
C f(x)= -3/5x+8
D f(x)= -3/5x-8

70 percent is c.f(x)=-3/5x+8

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.