Slope =1
Needs more characters so ignore this
You are given similarity. At this stage the diagram will tell you which sides correspond to which sides.
AC / DF = BC / EF
3 / 5 = 8 / 2x Cross multiply
3 * 2x = 5 * 8 Multiply
6x = 40 Divide by 6
x = 40 / 6
x = 6 4/6
x = 6 2/3
6 2/3 answer <<<<<<<
Answer:
A
Step-by-step explanation:
the function for this graph is:

so the domain (the input AKA THE x values) is all the real numbers.