8. In 2009, U. S. families, on average, spent $541.25 on back-to-school supplies. In 2016, the figure rose to $681.25.

a. Find a linear model in the form, y=mx+b, that fits this data using x=0 to stand for
the year 2000.

b. Use your model or perhaps another algebraic idea to predict the back-to-school cost in
the 2005

Ahiking trail is 6 miles long. it has 4 exercise stations, spaced evenly along the trail. what is the distance between each exercise station?

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.

Type the correct answer in each box. use numerals instead of words. if necessary, use / fir the fraction bar(s). the graph represents the piecewise function: h