To determine which form
of the equation you should use to solve a
problem, read the question carefully. The ques-
tion will ask you to find one of the variables.
Choose the form of the equation that is used
to solve for that variable.

y : ax

Explanation:

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when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

answer; /// the above statement is (true);