What happens to the value of the expression 80-2r as r decreases? Choose 1 answer: A It increases. (B) It decreases. (C) It stays the same.

Identify relationship between r and expression: Identify the relationship between r and the expression 80-2r. As r decreases, the value of 2r also decreases because it is directly proportional to r.Determine effect of decrease in 2r on expression: Determine the effect of a decrease in 2r on the expression 80-2r. If 2r decreases, then subtracting a smaller number from 80 results in a larger number. Therefore, the expression 80-2r increases as r decreases.Choose correct answer based on relationship: Choose the correct answer based on the relationship identified. Since the expression 80-2r increases as r decreases, the correct answer is A) It increases.

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What happens to the value of the expression
80-2r as
r decreases?
Choose 1 answer:
A It increases.
(B) It decreases.
(C) It stays the same.

What happens to the value of the expression $80-2 r$ as $r$ decreases? $\newline$ Choose $1$ answer: $\newline$ (A) It increases. $\newline$ (B) It decreases. $\newline$ (C) It stays the same.

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Math Problems

Grade 7

Write an equation from words

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Q. What happens to the value of the expression

80-2 r

r

decreases?

\newline

Choose

1

answer:

\newline

(A) It increases.

\newline

(B) It decreases.

\newline

Identify relationship between r and expression: Identify the relationship between $r$ and the expression $80$ $-2$ r. $\newline$ As $r$ decreases, the value of $2$ r also decreases because it is directly proportional to $r$ .
Determine effect of decrease in $2r$ on expression: Determine the effect of a decrease in $2r$ on the expression $80-2r$ . $\newline$ If $2r$ decreases, then subtracting a smaller number from $80$ results in a larger number. Therefore, the expression $80-2r$ increases as $r$ decreases.
Choose correct answer based on relationship: Choose the correct answer based on the relationship identified. $\newline$ Since the expression $80-2r$ increases as $r$ decreases, the correct answer is A) It increases.