The graph of [tex]$9x - 10y = 19$[/tex] is translated down 4 units in the [tex]$xy$[/tex]-plane. What is the [tex][tex]$x$[/tex][/tex]-coordinate of the [tex]x[/tex]-intercept of the resulting graph?



Answer :

To solve the problem, we need to determine the new equation of the graph after it has been translated down 4 units and then find the x-coordinate of the x-intercept of the new graph.

1. Translate the graph down 4 units:
- The original equation of the graph is [tex]\(9x - 10y = 19\)[/tex].
- Translating a graph down 4 units effectively means reducing the y-value of each point on the graph by 4. However, we can achieve the same effect by adjusting the constant term in the equation:

[tex]\[ 9x - 10(y + 4) = 19 \][/tex]

- Simplify the equation:

[tex]\[ 9x - 10y - 40 = 19 \][/tex]

- Solve for the new equation:

[tex]\[ 9x - 10y = 59 \][/tex]

2. Find the x-intercept of the translated graph:
- The x-intercept occurs where [tex]\(y = 0\)[/tex].
- Substitute [tex]\(y = 0\)[/tex] into the new equation:

[tex]\[ 9x - 10(0) = 59 \][/tex]

- Simplify:

[tex]\[ 9x = 59 \][/tex]

- Solve for [tex]\(x\)[/tex]:

[tex]\[ x = \frac{59}{9} \][/tex]

3. Final result:
- The x-coordinate of the x-intercept of the translated graph is:

[tex]\[ x \approx 6.555555555555555 \][/tex]

Thus, the x-coordinate of the x-intercept of the resulting graph is approximately [tex]\(6.56\)[/tex].