Sara used a number line to add. She started counting at 10, and then she counted until she was over the number –4 on the number line. If Sara is modeling addition, what number did she have to add to 10? Explain and show your reasoning.

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