Stephan gathered data about the average rainfall in two cities, He organized his data in the given graph. Click on all the true statements about the data

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122

Y= 4x + 3 y = - 1 4 x - 5 what is the best description for the lines represented by the equations?