SOLUTION: I know how to work out x and y intercepts accept when the problem reads like this: y = 10/7 x - 7 I am not sure how I am supposed to find the y intercept and also the fraction 10

Algebra ->  Linear-equations -> SOLUTION: I know how to work out x and y intercepts accept when the problem reads like this: y = 10/7 x - 7 I am not sure how I am supposed to find the y intercept and also the fraction 10       Log On


   



Question 1006730: I know how to work out x and y intercepts accept when the problem reads like this: y = 10/7 x - 7 I am not sure how I am supposed to find the y intercept and also the fraction 10 over 7 confuses me while trying to find these intercepts. Is y -7? Please help!
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Let x=0;
y=%2810%2F7%29%2A0-7
y=0-7
y=-7--------------this is the y-intercept, and you can say for an equation y=mx+b, the y-intercept is b.

The rational coefficient on x, 10%2F7 would often be found using any two points from the graph of the equation; or any two points which are to satisfy the equation.

The ratio of vertical change to horizontal change is SLOPE, and this is the coefficient on x in any equation such as y=%2810%2F7%29x-7 or y=mx%2Bb.


The x-intercept?
Let y=0 and solve for x.
y=%2810%2F7%29x-7
%2810%2F7%29x-7=0
%2810%2F7%29x=7
%2810%2F7%29%2Ax%287%2F10%29=7%287%2F10%29
highlight%28x=49%2F10%29---------the x-intercept