Pre-Algebra Examples

$7 y > 5 x - 7$

Step 1

Write in $y = m x + b$ form.

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Step 1.1

Divide each term in $7 y > 5 x - 7$ by $7$ and simplify.

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Step 1.1.1

Divide each term in $7 y > 5 x - 7$ by $7$ .

$\frac{7 y}{7} > \frac{5 x}{7} + \frac{- 7}{7}$

Step 1.1.2

Simplify the left side.

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Step 1.1.2.1

Cancel the common factor of $7$ .

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Step 1.1.2.1.1

Cancel the common factor.

$\frac{7 y}{7} > \frac{5 x}{7} + \frac{- 7}{7}$

Step 1.1.2.1.2

Divide $y$ by $1$ .

$y > \frac{5 x}{7} + \frac{- 7}{7}$

Step 1.1.3

Simplify the right side.

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Step 1.1.3.1

Divide $- 7$ by $7$ .

$y > \frac{5 x}{7} - 1$

Step 1.2

Reorder terms.

$y > \frac{5}{7} x - 1$

Step 2

Use the slope-intercept form to find the slope and y-intercept.

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Step 2.1

Find the values of $m$ and $b$ using the form $y = m x + b$ .

$m = \frac{5}{7}$

$b = - 1$

Step 2.2

The slope of the line is the value of $m$ , and the y-intercept is the value of $b$ .

Slope: $\frac{5}{7}$

y-intercept: $(0, - 1)$

Slope: $\frac{5}{7}$

y-intercept: $(0, - 1)$

Step 3

Graph a dashed line, then shade the area above the boundary line since $y$ is greater than $\frac{5}{7} x - 1$ .

$y > \frac{5}{7} x - 1$

Step 4