Lesson #3 - Precalculus

Find the slope of the line through: (−2,0) and (3,1)

• The slope is (1-0)/(3-(-2)) = 1/5.

• The slope is (1-0)/(3-(-2)) = 1/3.

• The slope is (1-0)/(3-(-2)) = 2/5.

• The slope is (1-0)/(3-(-2)) = 1/2.

Tags

CCSS.8.EE.B.5

Find the slope of the line through: (0,4) and (1,−1)

• The slope is (−1−4)/(1−0) = −5.

• The slope is (4−(−1))/(0−1) = 5.

• The slope is (−1+4)/(1+0) = 3.

• The slope is (4−(−1))/(1−0) = 5.

Tags

CCSS.8.EE.B.5

Using slope-intercept form, write the equation of a line with: slope 2 and y-intercept 3

• y = 2x + 3

• y = 3x + 2

• y = 2x - 3

• y = -2x + 3

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Using slope-intercept form, write the equation of a line with: slope −1/2 and y-intercept 4

• y = −1/2x + 4

• y = 2x + 4

• y = −1/2x − 4

• y = 1/2x + 4

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Write the equation of the vertical line through (5,2)

• x = 5

• y = 2

• x = 2

• y = 5

Write the equation of the horizontal line through (−3,4)

• y = 4

• x = -3

• y = -3

• x = 4

Rewrite the equation in standard form: 2y = 3x − 12

• 3x - 2y = 12

• - 3x + 2y = -12

• 3x + 2y = 12

• 2y = 3x + 12

Rewrite the equation in standard form: y = −2x + 5

• 2x + y = 5

• 2x - y = 5

• y - 2x = 5

• 2x + y = -5

Using point-slope form, write the equation of a line with: slope 3 through the point (1,2)

• y - 2 = 3(x - 1)

• y + 2 = 3(x + 1)

• y - 1 = 3(x - 2)

• y - 2 = 3(x + 1)

Using point-slope form, write the equation of a line with: slope −4 through the point (0,6)

• y - 6 = -4(x - 0)

• y + 6 = -4(x + 0)

• y - 0 = -4(x - 6)

• y - 6 = 4(x - 0)