line has the equation y=6x +b. What must be the value of b for the line to model a directly proportional relationship

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

Prove that quadrilateral is a rhombus.

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective