An equation of the line whose slope is 3 and whose y-intercept is 8 is ___?

y = mx + b

where m is the slope and b is the y-intercept
so y = 3x + 8

To find the equation of a line when you know the slope and y-intercept, you can use the slope-intercept form of a linear equation: y = mx + b.

Given that the slope is 3 and the y-intercept is 8, you can substitute these values into the equation:

y = 3x + 8

So, the equation of the line with a slope of 3 and a y-intercept of 8 is y = 3x + 8.

To find the equation of a line given its slope and y-intercept, you can use the slope-intercept form of a linear equation, which is given by:

y = mx + b

Where:
- m represents the slope of the line
- b represents the y-intercept

In this case, the slope (m) is 3 and the y-intercept (b) is 8. Plugging these values into the equation, we have:

y = 3x + 8

Therefore, the equation of the line with a slope of 3 and a y-intercept of 8 is y = 3x + 8.