The axis of symmetry of a parabola is the vertical line passing through its vertex. Given a parabola 
, the vertex x-coordinate can be found using
In your case, the formula leads to
So, this parabola is symmetric with respect to the line 
Answer:
Step-by-step explanation:
<u>According to data in the table we see pairs of points:</u>
<u>This gives us the rate of change:</u>
- (125 - 75)/(5 - 3) = 50/2 = 25
<u>The y - intercept is zero:</u>
- 75 = 3*25 + b
- 75 = 75 + b
- b = 0
<u>The line is:</u>
This is the line on the graph B
<u>Note.</u> <em>Its not clear what is needed regarding the table on the bottom</em>
Answer:
<h2>
a ∈ (-∞, -3></h2>
Step-by-step explanation:
<h3>-
21 ≥ 3(a - 7) + 9</h3><h3>
- 21 ≥ 3a - 21 + 9</h3>
+21 +21
<h3>
0 ≥ 3a + 9 </h3><h3>
3a + 9 ≤ 0</h3>
-9 -9
<h3>
3a ≤ - 9</h3>
÷3 ÷3
<h3>
a ≤ -3 </h3><h3>
a ∈ (-∞, -3></h3>
