Finite Math Examples

$y = - \sqrt{x - 1}$

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 $x$ .

$0 = - \sqrt{x - 1}$

Step 1.2

Solve the equation.

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Step 1.2.1

Rewrite the equation as $- \sqrt{x - 1} = 0$ .

$- \sqrt{x - 1} = 0$

Step 1.2.2

To remove the radical on the left side of the equation, square both sides of the equation.

${(- \sqrt{x - 1})}^{2} = 0^{2}$

Step 1.2.3

Simplify each side of the equation.

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Step 1.2.3.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{x - 1}$ as ${(x - 1)}^{\frac{1}{2}}$ .

${(- {(x - 1)}^{\frac{1}{2}})}^{2} = 0^{2}$

Step 1.2.3.2

Simplify the left side.

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Step 1.2.3.2.1

Simplify ${(- {(x - 1)}^{\frac{1}{2}})}^{2}$ .

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Step 1.2.3.2.1.1

Apply the product rule to $- {(x - 1)}^{\frac{1}{2}}$ .

${(- 1)}^{2} {({(x - 1)}^{\frac{1}{2}})}^{2} = 0^{2}$

Step 1.2.3.2.1.2

Raise $- 1$ to the power of $2$ .

$1 {({(x - 1)}^{\frac{1}{2}})}^{2} = 0^{2}$

Step 1.2.3.2.1.3

Multiply ${({(x - 1)}^{\frac{1}{2}})}^{2}$ by $1$ .

${({(x - 1)}^{\frac{1}{2}})}^{2} = 0^{2}$

Step 1.2.3.2.1.4

Multiply the exponents in ${({(x - 1)}^{\frac{1}{2}})}^{2}$ .

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Step 1.2.3.2.1.4.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

${(x - 1)}^{\frac{1}{2} \cdot 2} = 0^{2}$

Step 1.2.3.2.1.4.2

Cancel the common factor of $2$ .

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Step 1.2.3.2.1.4.2.1

Cancel the common factor.

${(x - 1)}^{\frac{1}{2} \cdot 2} = 0^{2}$

Step 1.2.3.2.1.4.2.2

Rewrite the expression.

${(x - 1)}^{1} = 0^{2}$

Step 1.2.3.2.1.5

Simplify.

$x - 1 = 0^{2}$

Step 1.2.3.3

Simplify the right side.

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Step 1.2.3.3.1

Raising $0$ to any positive power yields $0$ .

$x - 1 = 0$

Step 1.2.4

Add $1$ to both sides of the equation.

$x = 1$

Step 1.3

x-intercept(s) in point form.

x-intercept(s): $(1, 0)$

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 $y$ .

$y = - \sqrt{(0) - 1}$

Step 2.2

Simplify $- \sqrt{(0) - 1}$ .

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Step 2.2.1

Subtract $1$ from $0$ .

$y = - \sqrt{- 1}$

Step 2.2.2

Rewrite $\sqrt{- 1}$ as $i$ .

$y = - i$

Step 2.3

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

y-intercept(s): $None$

Step 3

List the intersections.

x-intercept(s): $(1, 0)$

y-intercept(s): $None$

Step 4