<span>slope formula, which states that m = (y2 -- y1) / (x2 -- x1).</span>
Answer:
y = -3x + 7
Step-by-step explanation:

m = slope
b = y intercept
eq:

Split up the interval [1, 3] into 4 intervals of equal length,

The left endpoint of the
-th interval is

The area under the curve is then approximately
