Q:

the line y=2x-4 is dilated bt a scale factor of 3/2 and centered at the origin. Write an equation that represent that image of the line after dilation

Accepted Solution

A:
To solve this problem you must apply the proccedure shown below:

 1. You have the the line y=2x-4 is dilated by a scale factor of 3/2 and centered at the origin.

 2. The form of the a line is y=mx+b, where m is the slope and b is the y-intercept. As dilation conserves the parallelism, the dilated linw will have the same slolpe: 2

 m=2

 3. By using the y-intercept, you have:

 (0,-4)

 0x3/2=0
 -4(3/2)=-6

 (0,-6)

 4. Therefore, the equation that represent that image of the line after dilation is:

 m=2
 b=-6

 y=2x-6