The answer is k=8 (4,6/8,7/12,8)
If I'm understanding this correctly you mean:
If a vertical line does not connect to more than one point in a relation then that relation is a function.
Then your answer is A-True.
That is called the vertical line test. The vertical line cannot touch more than one point at the same time if it is a function. If it does touch then it is not a function.
Answer:
50 cm²
The answer is that because the area of a parallelogram is height × width.
height = 10cm
width = 5 cm
10 × 5= 50cm²
