What point is on the line? $$y-4=3\left(x+1\right)$$

$$\left(-1,4\right)$$ **remember they are opposite because the formula for point slope has subtraction $$y-4=3\left(x-\left(-1\right)\right)$$ makes $$x_1=-1$$ and $$y_1=4$$

Find the x-intercept of $$2x-3y=-18$$

$$x=-9$$ Only use Ax=C and solve for x $$2x=-18$$ $$x=-9$$

Find the y-intercept of $$2x-3y=-18$$

$$y=6$$ Only use By=C and solve for y $$-3y=-18$$ $$y=6$$

Perpendicular lines have...

Opposite Reciprocal Slopes One is positive and one is negative The $$\frac{rise}{run}$$ flips

What two things do you need to write the equation of a line? How do you write equations of lines?

You need a point and a slope. Input them into point slope form and then transform into slope intercept or standard form. Point slope into slope intercept into standard form

If a line is given in standard form how do you graph it?

Find the x and y intercepts and graph

The slope of this line is:

Undefined $$\frac{rise}{run}=\frac{number}{0}$$

The slope of this line is:

zero or constant $$\frac{rise}{run}=\frac{0}{number}$$

If a line is parallel to $$y=\frac{2}{3}x+1$$ what would it's slope be?

$$m=\frac{2}{3}$$ parallel lines have the same slope

If a line is perpendicular to $$y=\frac{2}{3}x+1$$ what would it's slope be?

$$m=-\frac{3}{2}$$ perpendicular lines have opposite reciprocal slopes

If it says to write an equation and you're confused and a problem gives you a point and a slope what should you do with them??

Input them into point slope form!!!!!!!!!!

When you use the slope formula make sure your answer is...

SIMPLIFIED!!! For example $$m=\frac{16}{28}$$ is NOT Simplified!! $$m=\frac{4}{7}$$

Linear Functions Flash Cards

Flashcard

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Mathematics

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9th - 12th Grade

•

Practice Problem

•

Easy

•

CCSS

8.EE.B.5, 8.EE.B.6, HSF-IF.C.7A

Standards-aligned

Sarah Pezzullo

Used 9+ times

FREE Resource

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28 questions

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FLASHCARD QUESTION

Front

What is the slope formula?

Back

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