A graph of is shown and a c-value is given. For this problem, use the graph to find .
A)10
B)-15
C)0
D)15
E)does not exist

Question

A graph of  is shown and a c-value is given. For this problem, use the graph to find  . ​  ​  ​
A)10 
B)-15 
C)0 
D)15 
E)does not exist

Quizplus · Accepted Answer

From the graph, we can see that the c-value given falls on the x-axis at the point (-5,0). To find the corresponding y-value for this point, we look either at the graph or the equation given. From the equation, we can plug in x=-5 and simplify:

y = 2(-5) + 5 = -5

Therefore, the point on the graph is (-5,-5). The y-value of this point is 15 units away from the x-axis, above it, so the answer is D) 15.

A Graph of Is Shown and a C-Value Is