It should be D. You can multiply both numbers by 10 in order to make it in proportion to the graph. Hope this helps:)
When building a house, one must know the slope of the roof. Another example is when building skate parks, for half pipes require knowledge of slope.
Every number will have only 3 digits. In the ones place, there are 5 choices. For every choice of digit made in the ones place, there are 8 possible choices for the hundreds place (you can choose from 1-9, omitting whatever is used in the ones place), and there are 8 possible choices for the tens place (you can choose from 0-9, omitting whatever has already been used elsewhere).
So there are
![7\cdot8\cdot8=320](https://tex.z-dn.net/?f=7%5Ccdot8%5Ccdot8%3D320)
such numbers.
Its the identity property
When it looks like that it means that it is less then 3 so it is d