a)
y = 3x + 2
y(-1) = 3 * (-1) + 2 = -3 + 2 = -1
y(0) = 3 * 0 + 2 = 0 + 2 = 2
y(5) = 3 * 5 + 2 = 15 + 2 = 17
b)
y = x²
y(0) = 0² = 0
y(3) = 3² = 9
y(6) = 6² = 36
c)
y = 1/2x + 1
y(-4) = 1/2 * (-4) + 1 = -2 + 1 = -1
y(3/2) = 1/2 * 3/2 + 1 = 3/4 + 1 = 1 i 3/4
y(2) = 1/2 * 2 + 1 = 1 + 1 = 2
d)
y = -x
y(√5) = -√5
y(2,3) = -2,3
y(7) = -7
e)
y = -2x + 1
y(-5) = -2 * (-5) + 1 = 10 + 1 = 11
y(-2) = -2 * (-2) + 1 = 4 + 1 = 5
y(7,5) = -2 * 7,5 + 1 = -15 + 1 = -14
