Teacher : ...Graph radius compared to height. And I just want you to look Teacher : at the shape of the graphs, and see if you think that the shapes Teacher : are the same or different, or why they would be the same or different Teacher : Are they the same shape? Student: They're definitely not the same... Teacher : ____ Teacher : ____ Student1: No, because this one had the radius on the bottom, so that scale's smaller, Student1: so the slope is smaller... Teacher : I want you to take that word slope and throw it away. Teacher : Throw it away because the only kind of graph that can have a slope is what? Student: Linear. Teacher : So, throw it away. Now, are these linear? Student: No. Teacher: No. Okay. Are they increasing? Student: No. Teacher : No. Are they decreasing? Student: Yes. Teacher : And are they curved? Student: Yes. Teacher : Okay, so, are they similar shapes? Student: Yes. Teacher : They're more similar than they are different, aren't they? Student: Yes. Teacher : Okay, do they have a y-intercept? Student: No. Teacher : Do they have an x-intercept? Student: Yeah... No. No. Teacher : No. They don't cross the x-axis either. Teacher : No. They don't cross the x-axis either.