Question

Brayton is considering the expression 5 – 2c and says, “When c is increased by 1, the value of the expression decreases by 2.” Is Brayton’s statement always, sometimes, or never true? Explain how you know.

Answer 1

True

Explanation:

5 – 2c tells us to take 5 and subtract 2c. A few calculations demonstrate that the function always decreases by 2 for every 1 increase in c, since it is multiplied by 2 (2c). See the attached table. Each time c increases by 1, the output decreases by 2.