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Please help me, i’m confused on this.

Please help me, i’m confused on this.-example-1
Please help me, i’m confused on this.-example-1
Please help me, i’m confused on this.-example-2
User Anil Gupta
by
7.5k points

1 Answer

14 votes

Answer:

Answers A and B respectively

Explanation:

In the first pic, they are asking you for the value of the function at the points x = -1 and x = 5. Then you are asked to subtract your results. When the value of 'x' is -1, the 'y' value is 3. When the value of 'x' is 5, the 'y' value is -4. Therefore:


f(-1)-f(5)=3-(-4)=7

Answer A

For the second problem, they are saying that the line connecting points A and B is undefined. This means the slope is undefined along that line. An undefined slope is due to a zero in the denominator. Begin by taking the change in 'y' over the change in 'x' to get:


(y_1-1)/(x_1+2) =m

In order for our slope 'm' to be undefined, set the denominator to zero and see at what 'x' value this occurs at:


x_1+2=0


x_1=-2

Then they say that the line connecting points C and D is zero. A zero slope would mean a zero in the numerator. Again, begin by taking the change in 'y' over the change in 'x' to get:


(3-y_2)/(-5-x_2) =m

Set the numerator equal to zero to get:


3-y_2=0


y_2=3

Answer B

User Shane Smiskol
by
8.9k points

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