$\"\"$

Observe the graph, the two points $\"\"$ are lie on the line shown.

Substitute the values of $\"\"$ in the slope formula $\"\"$ .

$\"\"$ . $\"\"$

To find the y - intercept, substitute the values of $\"\"$ in the slope - intercept from of equation $\"\"$ and solve for b.

$\"\"$

Add 1 to each side.

$\"\"$

$\"\"$ .

Substitute the values of $\"\"$ in the slope - intercept form of equation $\"\"$ . $\"\"$

The equation of line is $\"\"$ .