How can you prove a triangle is an equilateral triangle?
a. use the distance formula to see if at least two sides are congruent.
b. use the slope formula to see if any sides are perpendicular.
c. use the distance formula to see if all three sides are congruent.
d. use the slope formula to see if any sides are parallel.

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