Question

Please help!!!!!!!!!!

Answer 1

`f(x)=2x^2-4x+1`

Substitute the values of x to the equation of the function f:

`x=-1\to f(-1)=2(-1)^2-4(-1)+1=2(1)+4+1=7\\\\x=2\to f(2)=2(2^2)-4(2)+1=2(4)-8+1=1`

Therefore we have two points (-1, 7) and (2, 1).

We can calculate the slope of line l.

The formula of a slope:

`m=(y_2-y_1)/(x_2-x_1)`

Substitute:

`m=(1-7)/(2-(-1))=(-6)/(3)=-2`

Answer: A) -2.