The diagrams shows different designs a child is making by stacking blocks a. Let n represent the number of blocks. Identify two algebraic expressions that represent the
pattern of blocks in the designs.

b. Describe the expression as linear, quadratic, exponentəl, or none of these. Explain your reasoning.

c. Algebraically prove your expressions are equivalent.

d. How many blocks would the artist have to make for Design 9? Explain your reasoning.