PSSA Math Practice Lesson 21 Rules for Patterns D Find missing elements in numeric or geometric patterns and/or functions (maybegiven a table or rule--pattern must show 3 repetitions. D Determine the rule of a function (given elements in an input-output table, chart or list--limit to linear functions)

ªYou can use numbers and variables to write rules for patterns. ª You can use numbers and variables to write rules for patterns. The number pattern may be given in a list, chart, or table, such as an x/y table

Write an equation that represents the relationship of x and y.

Which equation means the same as "a number n times 7 less 30 equals z"? n x = z n + 7 x 30 = z n x = z n x = z

Consider the following table of values: Which equation represents the relationship of x to y? y = x + 3 y = 3x y = 4x - 1 x = y - 4

10 According to the following table of values, which equation represents the relationship of s to t? t + 2 = s - 2 t - 2 = s s + 2 = t s - 2 = t

Which function describes the pattern in the table below? y = x - 3 y = x + 3 y = 2x - 5 y = x 2 - 3

Consider the following table of values: Which equation represents the relationship of x to y? y = 4x + 2 y = 4x - 2 y = 3x + 4 y = 2x

Which rule applies to the following table? y = 6x - 1 y = 6x + 1 y = 3x - 2 y = 2x

Consider the following table of values: Which equation represents the relationship of x to y? y = 6x -1 y = 5x + 1 y = 5x -1 y = x + 5 x y

Which number is missing from the following table? x y ?

Which number is missing from the following table? x y ? 5 27