2a. Find and interpret the x and y intercept of this line.
The x-intercept is 5 and means that after 5 comic books Priya has no money.
The y-intercept is 20 and means that, initially, Priya has 20 dollars
2b. Find and interpret the slope of this line.
The slope is
[tex]\begin{gathered} m=-\frac{20}{5}=-4 \\ \text{then} \\ m=-4 \end{gathered}[/tex]
and means that she spends 4 dollars for each comic book.
2c. Find the equation of this line.
From the last results, we know that the slope m=-4 and the y-intercept b=20, then by substituting these values into the line equation form y=mx+b, the equation is
[tex]y=-4x+20[/tex]
2d. If Priya buys 3 comics, How much money will she have remaining?
In this case x=3, then by substituting this value into the last equation, we get
[tex]\begin{gathered} y=-4(3)+20 \\ \end{gathered}[/tex]
which gives
[tex]\begin{gathered} y=-12+20 \\ y=8 \end{gathered}[/tex]
Then, Priya will have $8 after buying 3 comics
