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Learn to estimate derivatives at specified points on a curve, drawing tangent lines and calculating slopes using grid lines. Practice estimating values at each indicated point to enhance your understanding of derivatives.
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Point A • Draw in the tangent line to the curve at A • Estimate the slope (derivative) using the grid lines
Point A • It appears to go up about 2 units and right about 3 units • Thus we estimate: • Note: it looks like the value of point A is 1, so we could say
Point B • About 2 unit down for every 5 units right • Or
Point C • About four units down and three units right • Or
Point D • A little bit more than one unit down and one unit right • Or
Point E • About five units up and three units right • Or
Point F • Completely horizontal • Or