Dilations of Equations of Lines

How do you find the new equation after a dilation where the center of dilation is the on the line?

• The slope and y-intercept are mutliplied by the scale factor.

• Just the slope is multiplied by the scale factor

• Just the y-intercept is multiplied by the scale factor

• The equation stays the same

Tags

CCSS.HSG.CO.A.2

How do you find the new equation after a dilation where the center of dilation is NOT the on the line and is the point (0,0) /the origin?

• The slope and y-intercept are mutliplied by the scale factor.

• Just the slope is multiplied by the scale factor

• Just the y-intercept is multiplied by the scale factor

• The equation stays the same

Tags

CCSS.7.G.A.1

What is the equation of the line y = -2x when dilated by a scale factor of 2 about the origin?

• y = -2x

• y = -4x

• y = -2x + 2

Tags

CCSS.8.G.A.3

What is the equation of the line y = -x + 3 when dilated by a scale factor of 2 about the origin?

• y = -2x+3

• y = -x + 3

• y = -x + 6

• y = -2x + 6

Tags

CCSS.8.G.A.3

• A

• B

• C

• D

Tags

CCSS.8.G.A.3

What is the equation of the line y = 2/3x when dilated by a scale factor of 6 about the origin?

• y = 2/3x

• y = 2/3x + 6

• y = 4x

Tags

CCSS.8.G.A.3

What is the equation of the line y = 3x + 9 when dilated by a scale factor of 1/3 about the origin?

• y = 3x + 9

• y = x + 3

• y = x + 9

• y = 3x + 3

Tags

CCSS.8.G.A.3

What is the equation of the line y = 2x - 3 after a dilation of 4 about the origin?

• y = 8x - 3

• y = 8x - 12

• y = 2x - 3

• y = 2x - 12

Tags

CCSS.8.G.A.3

Write the slope-intercept form of the equation that has a slope of 4 and a y-intercept of −3.

• y = 4x − 3

• y = −3x + 4

• y = −4x + 3

• y = 3x − 4

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3