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  • Hi! I am Zora and this is Jarriah and Elijah. We will be teaching you lessons 44 and 49.
  • Lesson 44 is to Distinguish between situations that can be modeled with linear functions and with exponential functions.
  • Lesson 49 is to Represent data with plots on the real number line (dot plots, histograms, and box plots.
  • Lets start with lesson 44. What you need to know is that linear functions are functions with a constant rate of change. They are written in the form of y=mx+b.
  • Exponential functions have a slop that is raised to the x power. It looks like y=abx
  • The differences between linear and exponential functions is that the linear functions are straight lines while exponential functions look like a j-curve. Linear functions are constant. Exponential functions are not. 
  • For example, the function y=2x+9 is a linear function. The 2x is the rate of change while 9 is the y-intercept.
  • The function y = 2x  is an example of an exponential function. 
  • Now lets do lesson 49. A data plot holds data from a set of numbers. The first one we'll talk about is a dot plot. A dot plot is basically a number line with dots over the numbers depending on the situation. 
  • A histogram is a diagram consisting of rectangles whose area is proportional to the frequency of a variable and whose width is equal to the class interval.
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