Which equation describes the function table?

A b = a - 1
B a = b - 1
C b = 3a + 3
D b = 2a + 1

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

Sawsan recorded the favorite sport of students at her school. she surveyed 200 students. how many students chose tennis?

Determine the equivalent system for the given system of equations: 5x − 3y = 6 x + y = 2