draw a graph

[shahar]

1. How Can I explain part A? I see it. I can say something with X² can be a function? But what exactly? Can I have a unique formula to show for every point A in this quarter is will be calculated?
2. For part B, How can I explain why it not? How Can I show that A has positive values that cannot be all positive? Can it will be expalation because the part of the quarter is always positive where it is be?

 

[jalexandre]

1. You have the right idea. A quadratic function would work. It looks like the question is only asking you to draw it. You can draw any positive quadratic function that passes through A. As long as it stays above the x-axis, it will be fine.

2. Again, you have the right idea. A is positive because it's above the x-axis, so if a function passes through A you know for a fact that it must be positive at A.

 

[nasi112]

1. You have the right idea. A quadratic function would work. It looks like the question is only asking you to draw it. You can draw any positive quadratic function that passes through A. As long as it stays above the x-axis, it will be fine.

2. Again, you have the right idea. A is positive because it's above the x-axis, so if a function passes through A you know for a fact that it must be positive at A.

Draw a function that passes A and always negative. This means, draw a function and the function is always negative. This can not happen because any function pass through quadrant I and II has always positive values at these quadrants.

 

[nasi112]

View attachment 26707
1. How Can I explain part A? I see it. I can say something with X² can be a function? But what exactly? Can I have a unique formula to show for every point A in this quarter is will be calculated?
2. For part B, How can I explain why it not? How Can I show that A has positive values that cannot be all positive? Can it will be expalation because the part of the quarter is always positive where it is be?

This is a very Calculus problem