Answer: Yes
Step-by-step explanation:
To solve this, imagine you have a vertical line. You can use a ruler or something straight. Move the ruler across the screen. Does the ruler intersect 2 points at once? If so, then it is not a function. If it only intersects one point, then it is a function. 
Always remember: a function cannot have two x's with different y-values. 
Hope that helped!
 
        
             
        
        
        
Answer:
The answer to your question is below
Step-by-step explanation:
Data
function   f(x) = x² + 2x - 8
-See the graph below
1) x-intercepts
We observe in the graph that there are no x-intercepts.
2) y-intercepts
We observe in the graph that the y-intercept is (0, 8). Point A
3) axis of symmetry
The axis of symmetry is the line that divides the parabola into two equal parts. This line is x = -1 (blue line)
4) The vertex is the lowest point of the parabola, this point is (-1, 7)
Point B in the graph.
 
        
             
        
        
        
Answer:
.7 min per day
Step-by-step explanation:
3.5 ÷5=0.7
0.7×5=3.5 or 3 1/2
 
        
             
        
        
        
Answer:
4.2
Step-by-step explanation:
You just have to subtract the two fractions and put it in decimal form.
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