Looking for trustworthy answers? Westonci.ca is the ultimate Q&A platform where experts share their knowledge on various topics. Join our platform to connect with experts ready to provide detailed answers to your questions in various areas. Get immediate and reliable solutions to your questions from a community of experienced professionals on our platform.

How do I do this question Do the data in the table represent a linear function? If so write a rule for the function

How Do I Do This Question Do The Data In The Table Represent A Linear Function If So Write A Rule For The Function class=

Sagot :

ANSWER

No

EXPLANATION

To see if this table represents a linear function, we have to find the slope - also called the average rate of change,

[tex]m=\frac{y_1-y_2}{x_1-x_2}[/tex]

We can find it using the first two points in the table, (-2, -7) and (-1, 1),

[tex]m=\frac{1-(-7)}{-1-(-2)}=\frac{1+7}{-1+2}=\frac{8}{1}=8[/tex]

Let's assume that this is a linear function. Then, the equation would be,

[tex]y=8x+b[/tex]

Use the first point in the table to find the y-intercept, b,

[tex]\begin{gathered} -7=8\cdot(-2)+b \\ -7=-16+b\text{ }\Rightarrow\text{ }b=16-7=9 \end{gathered}[/tex]

So, we have the equation,

[tex]y=8x+9[/tex]

Now, we have to check if all the points in the table satisfy this equation. If they do, then the table represents a linear function and this is the equation,

[tex]\begin{gathered} -7=8(-2)+9 \\ -7=-16+9 \\ -7=-7\text{ }\Rightarrow\text{ }true \end{gathered}[/tex][tex]\begin{gathered} 1=8(-1)+9 \\ 1=-8+9 \\ 1=1\text{ }\Rightarrow\text{ }true \end{gathered}[/tex][tex]\begin{gathered} 8=8\cdot0+9 \\ 8=8\text{ }\Rightarrow\text{ }false \end{gathered}[/tex]

The third point in the table does not satisfy the linear equation, but all the other points do.

Hence, this table does not represent a linear function.