The profit from the lemonade sale can be modeled by P = c - 25. How many cups need to be sold make a profit of $40?
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The slope-intercept form of a line is:
Where m is the slope and y is the y-intercept:
To find q (y-intercept), substitute the coordinates of the point (9, -4) in the equation of the line and solve it as an equation:
-4=3(9)+q
-4=27+q
q=-27-4=-31
The equation of the line is: y=3x-31
Where m is the slope and y is the y-intercept:
To find q (y-intercept), substitute the coordinates of the point (9, -4) in the equation of the line and solve it as an equation:
-4=3(9)+q
-4=27+q
q=-27-4=-31
The equation of the line is: y=3x-31