- Look again at Practice Exercise 9 and its solution from Chap. 27. Create a table of
values for both functions, based on x-values of −3,−2,−1, 0, 1, 2, 3, and 4. Here are
the functions that came from the original equations:
y= 2 x^3 +x^2 +x− 4
and
y= 3 x^3 − 2 x^2 + 4 x− 5
Use bold numerals to indicate the real solutions, if any exist.
- Plot an approximate graph showing the curves based on the table you created when you
worked out Prob. 9. On the x axis, let each increment represent 1 unit. On the y axis,
let each increment represent 20 units. Draw the first function’s graph as a solid line or
curve. Draw the second function’s graph as a dashed line or curve. Plot and label all real
solution points, if any exist.
478 More Two-by-Two Graphs