If f(x) varies directly with x^2, and f(x) = 75 when x = 5, find the value of f(8). 192 256 25 40

The correct answer option is 192.

Step-by-step explanation:

We know that f(x) varies directly with so we can write it as:

∝

Changing it to an equality by the addition of a constant :

If f(x) = 75 when x = 5, then we can find the value of k:

If k = 3, we can find the value of f(8):

192

o= 4(i) +3

step-by-step explanation:

o is your output value and i is your input value. so, for example, if we stuck 7 in as our input, we would first multiply by 4 ( pemdas ), which equals 28. then we would add 3 to 28, for a total output of 31. this may not be a graph, but, it is a way to solve your formula..

439400

step-by-step explanation:

130^2 = 16900

16900*26 = 439400