Question

here is the graph y=7-x for values of x from 0 to 7.
use the graph to solve the simultaneous equations y=7-x and y =x-1

Answer 1

Given : graph y=7-x for values of x from 0 to 7.  and y =x-1

To find : use the graph to solve the simultaneous equations

Solution:

y=7-x

y =x-1

Equating both

7-x  = x - 1

=> 2x = 8

=> x = 4

=> y = 3

( 4 , 3) is the point

x y=7-x y=x-1

0 7 -1

1 6 0

2 5 1

3 4 2

4 3 3

5 2 4

6 1 5

7 0 6

(4,3) is the solution

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