At what values of x does the function y = f (x) take on values a) greater than 21 b) less than -15 y = -3x
| July 25, 2021 | education
Function: f (x) = -3x. Function value: y.
a) Solve the inequality -3x> 21.
Divide both sides of the inequality by -3. Since we divide by a negative number, the inequality sign changes.
We get x> -7.
b) Solve the inequality -3x <-15.
Divide both sides of the inequality by -3. Since we divide by a negative number, the inequality sign changes.
We get x> 5.
Answer: a) x> -7; b) x> 5.
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