Describe and correct the error in finding the solution.
-4.2x=21
-4.2x/4.2=21/4.2 x=5

The error is that the person divided both sides by positive 4.2 rather than negative 4.2. Here's how to correct it:

I hope this helps!

see attached

step-by-step explanation:

given the function as;

write the equation replacing f(x) with y

form   and fill a table containing values of y with corresponding values of x

you can take a range for   values of x as -3≤x≤3

solving for x=-3

for x=-2

repeat the same procedure to get the values of y for the remaining ,x=-1 to x=3

plot the values of y against values   of x and obtain the following graph