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When the coefficient of x is positive the line is vertical?
no, false
When the coefficient of x is positive the line what?
Has a positive gradient (in a y=mx+c graph)
How do you do scientific notation with a negative coefficient?
The same as with a positive one.
Why slope of VI characteristics is positive for tungsten lamp?
The slope of the voltage-current (VI) characteristics for a tungsten lamp is positive because as the current increases, the temperature of the tungsten filament rises, leading to an increase in resistance. This phenomenon is due to the positive temperature coefficient of resistance of tungsten, where the resistance increases with temperature. Consequently, the relationship between voltage and current becomes non-linear, resulting in a positive slope in the VI characteristics. This behavior is typical for incandescent lamps, where the filament's temperature significantly affects its electrical properties.
What does a correlation coefficient of zero indicates?
A coefficient of zero means there is no correlation between two variables. A coefficient of -1 indicates strong negative correlation, while +1 suggests strong positive correlation.
