Answer:
D(3;-2).
Step-by-step explanation:
1) 
2) according to the formulas above:

3) finally, D(3;-2).
Answer:
add
Step-by-step explanation:
increased is another word for add
9÷2 is 4.5
k > 4.5
now just simply observing in above we can find this condition is fulfilled in third one
F(4) is function notation that means the value of y when x = 4.
Replace x with 4 in the expression and evaluate the right side.
f(x) = 3x - 15
f(4) = 3(4) - 15
f(4) = 12 - 15
f(4) = -3