Check whether 90 is a perfect square?​

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1

Which of the following is best modeled using a linear equation y=ax+b, where a is less than 0?

The function f(x) is shown in this graph the function g(x)=6x