Question

What is the y- intercept of the line (-10,-4) &(-1,2)

Answer 1

I'm assuming you means "What is the y- intercept of a line passing through (-10,-4) &(-1,2)"
The best way to do this would be to plot the two points, draw a line connecting them with a ruler, and then see where it intercepts the y-axis.
Here's a graph, see if you can find the slope and where it intercepts the y axis.
If you have any trouble let me know.