What kind of function that models the set of data points -1–20 206 one -10 to -26 and three -42

Answer 1

It appears that the data points given consist of three intervals of values: from -1 to 20, from -10 to -26, and from -42 to -42. One way to model this data using a piecewise function is as follows:

f(x) =
-1 ≤ x ≤ 20 : 206
-10 ≤ x ≤ -26 : 1
-42 ≤ x ≤ -42 : 3

This function would output 206 for any x value between -1 and 20, output 1 for any x value between -10 and -26, and output 3 for x equal to -42.