If you apply the changes below to the linear parent function f(x)=x what is the equation of the new function when its vertically stretched by a factor of 3 and when it flips over the x axis

Answer 1

In order to vertically stretch a function by a number n, you multiply the function by n. So f(x) = x vertically stretched by a factor of 3 is f(x) = 3x. In order to flip this function over the x axis, you only need to multiply it by -1, so the new function is f(x) = -3x