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GeOmEnTrY
What is an equation for the line that passes through points (–1, –4) and (1, 4)? Write the equation in slope-intercept form. the most I know is that I believe you use the formula y=mx+b I just have trouble actually solving it. Help please and thank you?
(y-y1)/(y2-y1)=(x-x1)/(x2-x1)
you cant use y=mx+b because you dont know b (y intercept)
First you need to find the slope. Here is the formula: |dw:1352307856268:dw| then you plug the slope you found into y=mx+b, m being the slope, along with either point from the problem as x and y. Solve for b. Once you've found b, plug both b and the slope in y =mx +b and you have your answer.
Oh! Alrighty, that really helps alot thank you :)