Linear Equations Review

Linear Equations Review

Calculating Slope

• If you forgot how to use the slope formula please copy and paste the link into a browser for a refresher.

• https://www.youtube.com/watch?v=OjEKoXBZf7w

• Hint: Use the slope formula (y2-y1)/(x2-x1)

Multiple Choice

What is the slope of the line that passes through the points:

(-1, 3) & (4, -1)

• 4/5

• -5/4

• -4/5

• 5/4

Multiple Choice

Find the slope of the line that passes through points:

(0, 6) & (-5, 2)

• -5/4

• 5/4

• -4/5

• 4/5

Writing Equations Given slope & point

• If you forgot how to use a point and the given slope to write an equation in slope intercept form, please copy and paste the link into a browser for a refresher

• https://www.youtube.com/watch?v=eVLM6EzlkSo

• Hint: plug in the slope for m and then plug in the coordinate point (x,y) to solve for the only variable you don't have, b (y-intercept)

Multiple Choice

What is the equation to the line that has a slope of 2 and passes through the point (1, -4)?

• y= 2x - 6

• y= 2x + 6

• y= 6x + 2

• y= 6x - 2

Multiple Choice

What is the equation to the line that passes through the point (8, 1) and has a slope of -1/2?

• y= -1/2x - 5

• y= -1/2x + 8.5

• y= -1/2x - 8.5

• y=- 1/2x + 5

Write an equation given two points

• If you don't remember how to write the equation to the graph that passes through two points, please watch the video below for a refresher.

• https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:forms-of-linear-equations/x2f8bb11595b61c86:writing-slope-intercept-equations/v/equation-of-a-line-3

• Hint: first calculate the slope using the slope formula then choose a coordinate point (x,y) to plug in with your slope to find your missing b value

Multiple Choice

Find the equation of the line that passes through the points (1,3) and (2,4).

• y= -x + 4

• y= x + 2

• y= -x - 4

• y= x - 2

Multiple Choice

Find the equation of a line that passes through the points

(2, 16) and (-1, 7)

• y= 3x + 10

• y= -3x + 4

• y= 1/3x + 22/3

• y= -1/3x - 22/3