I don't know the answer, but i know how to solve it. you have to do y/x to find the slope. One equation could be y=mx=b. Or y=mx. Or ax+by=c. then plot your points and replace m and b with the right coordinates.
so if we write the equation in y- intercept form its <u><em>y=mx+b</em></u> with m slope and b the intercept. so if we plug in the things we know, it becomes -7=-42+b. we solve this to get that b is 35 to make this equation work. now we know the equation, which is y= -7x+35
