Need help with these questions (calculus)
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Take a look at the function 
. You can simplify it to 
. If x=0, then y=2 and when y=0, x=3. You obtain two points (0,2) and (3,0) that lie on the line .
Since
, the line should belong to the shaded area.
Now take point (0,0). Since
, you can conclude that point (0,0) belongs to the shaded area.Using all these thoughts, you can make a conclusion that the correct choice is B.
Since
Now take point (0,0). Since
Maximum value : x=-4
The graph of the parabola opens down, since the value of a (-2) is a negative coefficient. This means the parabola has a maximum value, not a minimum value. The vertex of the parabola is -4, which is the maximum value of the graph.
The graph of the parabola opens down, since the value of a (-2) is a negative coefficient. This means the parabola has a maximum value, not a minimum value. The vertex of the parabola is -4, which is the maximum value of the graph.