represent the result of the problem in a library are there 5 groups of 5 towers and each one has 5 books are there in total? Give results raised to power

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

Determine whether the samples are independent or dependent. upper a data set includes the morning and evening temperature for the lasta data set includes the morning and evening temperature for the last 90 days.90 days.

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?