Write a linear function f with f(2)= –2 and f(1) =1.

f(x) =

Answer - the answer should be:

-3x+4

down below is how i did it,

Step-by-step explanation:

use the formula mx+b=y

y is f(x)

m = -3

x = x

b = 4

so,

mx+b is -3x+4

f(x)=-3x+4

Step-by-step explanation:

Slope= -3

(1-(-2))/(1-2)=3/-1= -3

Y-intercept= 4

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.