Find the line that passes through the point (-1,3) and the point of intersection of the lines x+3y=1 and 2x-y=-5. leave your equation in point slope form.

To find the second point noted. Set each equation given to 0.

And

Then find the intersection point of each. I used my calculator and the intersect function but I believe you can do it mathematically as well. The point is (-2,1).
Then to build the equation I used the slope formula and used the slope to move across the graph to the y intercept.
The equation is

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )