since this is a graded assignment to be handed in, i will not do the problem for you. i will rather give you the method, or hints on how to solve the problems.
you may want to search the forum for something like "equation of a line," there are many problems of this nature that has been done here.
the slope intercept form of a line is: where is the slope, and is the y-intercept
here's how to get that equation given two points on a line.
we first find the slope:
recall that the slope is rise over run, that is, change in y divided by the change in x. so given two points on a line, and , we find the slope, m, as follows:
we then use the point-slope form:
use either of the points given and the slope you found, and plug them into the slope-intercept form shown below:
where is the point you used, and m is the slope
finally, solve for y:
solving for y in the above form and simplifying will give you the slope-intercept form of the equation of the line