When graphing a linear equation that is written in the form y=mx+b, the variable m represents the y-intercept. assuming that b> 0, which of the following best describes how reversing the sign of b would affect the graph? a) the new line will be shifted down b units b) the new line will be shifted down b x 2 units c) the new line will be a perfect reflection across the x-axis d) the new line will be a perfect reflection across the y-axis

B. A numeric example of this is with a y-intercept of 7. Changing it to -7 will cause a downwards shift of 14 units. This is because it takes 7 units to get down to 0, then another 7 to get to -7.
A downwards shift of b units will always result in a new value of 0, so this is obviously not true. Reflection has nothing to do with the y-intercept, or b value. So beyond the mathematical explanation provided above, you could solve this using the process of elimination.

19838483818838484849 pieces of wood.

It’s according to the question. but most of the time the answer is b