Evaluating Linear Function

If y=6x and x=3 what is y?

• 9

• 18

• 3

• 18x

If y=-7x and x=-6 what is y?

• -42

• 42

• -13

• 76

If y=3x+5 and x=0 what is y?

• 5

• 8

• 8x

• 0

If y=-8x+2 and x=-4 what is y?

• 34

• 4

• -10

• 2

Evaluate f(x) = x² for f(-8)

• 64
• -64
• -16
• 16

Evaluate f(x)=-2t²+ 1 for f(-3)

• 19
  
• 37
• -17
• -11

Evaluate f(x)=-2t²+ 1 for f(2)

• 9
  
• 17
• -17
• -7

Evaluate f(x)=-2x+13   for f(10)

• -7
• 1
• -8
• 7

Given 
f(x)= 2x² + 5x - 17, find f(-1). 

• f(-1) = -20
• f(-1) = -24

f(x) = - 2x²
find f(- 7)

• - 28
• 28
• - 98
• 98