SOLUTION: 9x + y = 8 how to find the x intercepts

Click here to see ALL problems on Graphs

Question 1127672: 9x + y = 8 how to find the x intercepts
Found 4 solutions by ikleyn, josgarithmetic, greenestamps, Alan3354:
Answer by ikleyn(52810)   (Show Source):
You can put this solution on YOUR website!
.

To find the x-intercept, you need to put y= 0 in the equation: 9x + 0 = 8. You then will get x = . It is your answer: x-intercept is , if you refer to the value in the number line. If you want to refer to the point in a coordinate plane, then you may say that x-intercept is the point (,).

Solved.

Answer by josgarithmetic(39620)   (Show Source):
You can put this solution on YOUR website!
See mentally one of them is (0,8).

Set y to 0 and solve for x, to get the x-intercept.

Answer by greenestamps(13203)   (Show Source):
You can put this solution on YOUR website!

It is a basic concept that you want to understand, as it will make a lot of things easier to understand.

(1) An x-intercept is a place where a graph crosses the x-axis.
(2) Everywhere on the x-axis, the y value is 0.
(3) Therefore, to find the x-intercept(s) of a graph, set y=0 and solve the resulting equation.

In your example...
9x+y = 8
9x+0 = 8
9x = 8
x = 8/9

Note that the answer to the question "what is the x-intercept" can be either the x value by itself, "8/9", or the ordered pair with y=0, "(8/9,0)".

It's not part of your question, but note that finding y-intercepts is similar.

(1) A y-intercept is a place where a graph crosses the y-axis.
(2) Everywhere on the y-axis, the x value is 0.
(3) Therefore, to find the y-intercept(s) of a graph, set x=0 and solve the resulting equation.

Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website!
9x + y = 8 how to find the x intercepts
----------
It's linear --> straight line
1 x-intercept, not "intercepts"