To solve the inequality using a table, we first have to create functions out of the inequality's left-hand and right-hand sides.
y=2(4)^(x+3) and y=8
To enter them in your calculator, push Y= and write the equations in the first two rows.
Next, by pushing 2nd and GRAPH, we get a table of values for whole numbers of x. Note that we are looking for x-values that makes the Y_1-column less than or equal to 8.
From the table, we see that at x=- 2 the value of the exponential function becomes exactly 8. Therefore, the solution to the inequality has to be all values of x that are less than or equal to - 2.
x ≤ - 2
