Final answer:
The slope of the line is 3/2 and the y-intercept is -45.
Step-by-step explanation:
To graph the equation 20y - 30x = -900, we can rearrange it in slope-intercept form y = mx + b, where m is the slope and b is the y-intercept. Rearranging the equation, we have:
20y = 30x - 900
y = (30/20)x - 900/20
y = (3/2)x - 45
From this equation, we can see that the slope is 3/2 and the y-intercept is -45.