Question

B 3. Describe the pattern of change in the number of rods as the number of steps increases,4. How is the pattern you described shown in the table? How is it shown in the graph?5. How many steel rods are in a staircase frame with 12 steps? Explain how you could find thisnumber without drawing the staircase frame.

Answer 1

3.- If the number of steps increases, the number of rods also increases.

4.- In the graph is shown because of the stepness or a positive slope, in the table is shown because the number of steps increase each time just in one unit and the number of rods increases in 4 units or more.

5.- 90

because at 8 steps there are 48 rods, and before it the number of steps is increasing by one unit, then we must add 9 + 10 + 11 + 12 to 48

9 + 10 + 11 + 12 + 48 = 90