I think you have to choose any numbers in the graph to solve for Rafael and Ava
Answer:
i)D:
ii)R: 
iii) Y-int:(0,3)
Step-by-step explanation:
i) The given absolute value function is;
.
The absolute value function is defined for all real values of x.
The domain is all real numbers.
ii) The range is all y-values that will make x defined.
The given function,
.
has vertex at, (-3,0) and opens upwards.
This implies that, the minimum y-value is 0.
The range is 
iii) To find the y-intercept substitute x=0 in to the function.
.
.
.
The y-intercept is (0,3)
See attachment for graph.
Step-by-step explanation:
earbuds
we have a 1in : 0.2in scale of drawing to reality.
0.2 = 2/10 = 1/5
so, 1in in the drawing is actually 1/5in in reality.
how long are the 4in in the drawing ?
well, 4 times the 1in thing.
4×1/5 = 4/5 = 0.8in long
again the similar triangles
similar triangles means that each pair of corresponding lines (sides, heights, ...) in the triangles follows the same scaling factor for the length.
so, what do I need to multiply the side of the large triangle with to get the corresponding side length of the small triangle ?
27 × x = 9
x = 9/27 = 1/3
and that is the scale factor.
Answer: Add all the numbers together which equals 55, then divide by how many numbers there are (5) so the answer is 11