18.4k views
1 vote
a line y = 3x - 5 is reflected in x = a so that the image is given by y = 1 - 3x. what is the value of A?

User Kattie
by
7.5k points

1 Answer

1 vote

Answer: The line y = 3x - 5 can be expressed in the form y = mx + b, where m is the slope and b is the y-intercept. In this case, m = 3 and b = -5.

When a line is reflected across the x-axis, the slope of the line changes sign, but the y-intercept remains the same. This means that if the original line has slope m and y-intercept b, the reflected line will have slope -m and y-intercept b.

For the image, y = 1 - 3x, the slope is -3 and the y-intercept is 1.

To find the value of a, we can set the two lines equal to each other and solve for x:

3x - 5 = 1 - 3x

Solving for x, we get:

4x = 6

x = 3/2

So the line of reflection, x = a, passes through

Explanation:

User Jack Desert
by
7.6k points