Question 811973
Here is the part of the lesson you missed
Write: A(s) = s^2 
A(3.5) = (3.5)2 Substitute 3.5 for S
[Substitute 3.5 for S]

In your two problems substitute the number for x

The easiest way is to think of F(x) as y
y = -3x+2 for x = 3
F(x) = -3x+2 for x = 3
now just plug in 3 every time you see x

F(3) = -3*3+2 
f(3) = (-3*3)+2 
F(3)=-9+2
F(3)=-7
ordered pair (3,-7)

y= 1/2 x -1 for x = -2
F(x) = 1/2 x -1 for x = -2
now just plug in =2 every time you see x
F(-2) = 1/2 *(-2) -1 
F(-2)=-1-1
F(-2)=-2
ordered pair (-2,-2)