Which equation represents the line whose slope is 2 and whose y-intercept is 6

The basic format for questions like these are y=mx+b where m stands for the slope and the b stands for the y-intercept, and x and y stand for the coordinates of the equation. So if you fill it in, it would be y=2x+6.

Slope of 2 means that the the x part is 2x

So when x is 0 y must equal 6

so the equation is y = 2x + 6