SOLUTION: A straight line joins the points (3,9) and (-1,1) . determine x intercept of the line. Please explain step by step.Thanks

Algebra ->  Graphs -> SOLUTION: A straight line joins the points (3,9) and (-1,1) . determine x intercept of the line. Please explain step by step.Thanks      Log On


   

Question 674506: A straight line joins the points (3,9) and (-1,1) . determine x intercept of the line. Please explain step by step.Thanks
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
slope = %289-1%29%2F%283--1%29+=+8%2F4+=+2
...
Point slope formula
y - 9 = 2(x-3)
y - 9 = 2x - 6
y = 2x - 6 + 9
highlight%28y+=+2x+%2B+3%29
...
x intercept is where y = 0
0 = 2x + 3
2x = -3
x = -3%2F2
(-3%2F2, 0)
...
graph%28300%2C200%2C-10%2C10%2C-10%2C10%2C2x%2B3%29
.....................
Delighted to help.
-Reading Boosters
Website: www.MyHomeworkAnswers.com
Wanting for others what we want for ourselves.