Question

solve graphically x-y=0;y+3=0

Answer 1

Given:

System of equations,

x - y = 0

y + 3 = 0

To Do:

Solve it graphically.

Solution:

We will find the points to be plotted for each equation.

For x - y = 0,

x           -2         -1           0         1         2      

y           -2         -1           0         1         2

Now we can plot these points to get a straight line on the graph.

For y + 3 = 0,

It's a straight line y = -3 parallel to x-axis.

By using a graphing calculator,

We find both the lines intersect at a point P(-3, -3)

Therefore, solution of the system of equations is,

x = -3

y = -3