Question

hypothesis formation is key to any good experiment... check all that apply
hypothesis is an educated guess
is properly phrased as and if, then statement
must be testable
must have only 1 testable variable
can test many variables at one time
must be repeatable

Explanation:

A hypothesis is an educated guess based on prior knowledge. It is typically phrased as an "if - then" statement. It must be testable to be useful in an experiment. While it can focus on one main testable variable, it doesn't mean only one variable can be involved in an experiment overall. And for the results to be valid and reliable, it should be repeatable.

Answer:

Hypothesis is an 'educated guess'
Is properly phrased as an "If , then " statement
Must be testable
Must be repeatable