Assume the table represents a linear function.

a. Complete the box in the first row.
\begin{tabular}{|c|c|}
\hline [tex]$x$[/tex] & [tex]$y$[/tex] \\
\hline 0 & [tex]$\square$[/tex] \\
\hline 20 & 16 \\
\hline 40 & 28 \\
\hline
\end{tabular}

b. Report the equation of the line in slope-intercept form: [tex]$y=\square x+\square$[/tex]



Answer :

Sure! Let's work through this step by step.

### Part (a)

We have a table representing points of a linear function:

[tex]\[ \begin{tabular}{|c|c|} \hline $x$ & $y$ \\ \hline 0 & $\square$ \\ \hline 20 & 16 \\ \hline 40 & 28 \\ \hline \end{tabular} \][/tex]

First, we need to find the value of [tex]\( y \)[/tex] when [tex]\( x = 0 \)[/tex]. This is essentially finding the y-intercept [tex]\( b \)[/tex] of the line.

We were given the points [tex]\((20, 16)\)[/tex] and [tex]\((40, 28)\)[/tex].

1. Calculate the slope [tex]\( m \)[/tex]:
[tex]\[ m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{28 - 16}{40 - 20} = \frac{12}{20} = 0.6 \][/tex]

2. Find the y-intercept [tex]\( b \)[/tex]:
Use the point [tex]\((20, 16)\)[/tex] and the slope [tex]\( m \)[/tex] to find [tex]\( b \)[/tex]:
[tex]\[ y = mx + b \implies 16 = 0.6 \cdot 20 + b \implies 16 = 12 + b \implies b = 16 - 12 \implies b = 4 \][/tex]

Given [tex]\( x = 0 \)[/tex], the value of [tex]\( y \)[/tex] is:
[tex]\[ y = b = 4 \][/tex]

So, the table now looks like this:

[tex]\[ \begin{tabular}{|c|c|} \hline $x$ & $y$ \\ \hline 0 & 4 \\ \hline 20 & 16 \\ \hline 40 & 28 \\ \hline \end{tabular} \][/tex]

### Part (b)

Next, we need to report the equation of the line in slope-intercept form, [tex]\( y = mx + b \)[/tex].

We have already calculated the slope [tex]\( m \)[/tex] to be [tex]\( 0.6 \)[/tex] and the y-intercept [tex]\( b \)[/tex] to be [tex]\( 4 \)[/tex].

Thus, the equation of the line is:
[tex]\[ y = 0.6x + 4 \][/tex]

Therefore, our final answers are:

a. The value in the first row for [tex]\( y \)[/tex] when [tex]\( x = 0 \)[/tex] is 4.

b. The equation of the line in slope-intercept form is [tex]\( y = 0.6x + 4 \)[/tex].