A Swimming Pool is 50 feet long. Rima swims a distance of 2.5 feet every second. She wants to know how many seconds it takes her to swim across the pool.

ask the math teacher she or he would know lol.

step-by-step explanation:

graph #4 (last graph) depict the function   f(x)= -m(x-d)^1/5 i

step-by-step explanation:

we know that

m=slope

but in this function slope is -m that means slope is decreasing and it is decreasing by 1/5 points down the x-axis.

which is shown in graph four

a decreasing slope down x-axis by 1/5 points.

hence 4th graph is the right option for this.