From the information, write the degree of Celsius as x - coordinate and the degree of Fahrenheit as y - coordinate.

From the information, the points are .

Substitute the values of in the slope formula .

.

To write the line equation, we can use either of the two given points.

Consider the point (0, 32).

Substitute in point-slope form equation or .

Add 32 to each side.

.

The slope and y - intercept .

Graph the line using given point and slope.

1.  Draw a coordinate plane.

2.  Plot the point .

3.  Find the next point using . Start at and go up 9 units and right 5 units, then mark a dot and label it. \ \

4.  Draw a line through these points.

The line equation is and its graph is