Calculus Examples

$f (x) = \frac{4}{x - 7}$

Step 1

Find the x-intercepts.

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Step 1.1

To find the x-intercept(s), substitute in $0$ for $y$ and solve for $x$ .

$0 = \frac{4}{x - 7}$

Step 1.2

Solve the equation.

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Step 1.2.1

Set the numerator equal to zero.

$4 = 0$

Step 1.2.2

Since $4 \neq 0$ , there are no solutions.

No solution

Step 1.3

To find the x-intercept(s), substitute in $0$ for $y$ and solve for $x$ .

x-intercept(s): $None$

Step 2

Find the y-intercepts.

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Step 2.1

To find the y-intercept(s), substitute in $0$ for $x$ and solve for $y$ .

$y = \frac{4}{(0) - 7}$

Step 2.2

Solve the equation.

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Step 2.2.1

Remove parentheses.

$y = \frac{4}{0 - 7}$

Step 2.2.2

Remove parentheses.

$y = \frac{4}{(0) - 7}$

Step 2.2.3

Simplify $\frac{4}{(0) - 7}$ .

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Step 2.2.3.1

Subtract $7$ from $0$ .

$y = \frac{4}{- 7}$

Step 2.2.3.2

Move the negative in front of the fraction.

$y = - \frac{4}{7}$

Step 2.3

y-intercept(s) in point form.

y-intercept(s): $(0, - \frac{4}{7})$

Step 3

List the intersections.

x-intercept(s): $None$

y-intercept(s): $(0, - \frac{4}{7})$

Step 4