30 !line a has a slope of 2 and passes through the point (3, 15). line b has a slope of 2 and passes through the point (5, 19). which of the following statements is true about the system of equations represented by line a and line b? a. the system of equations has no real solutions. b. the system of equations has exactly one real solution. c. the system of equations has an infinite number of real solutions. d. the system of equations has exactly two real solutions.

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.