Answer
$\sqrt {10}$ units
Work Step by Step
Use the formula $d(P_1,P_2)=\sqrt {(x_2-x_1)^2+(y_2-y_1)^2}$:
$d( (–1, 1), (2, 2))
\\=\sqrt {[2-(-1)]^2+(2-1)^2}
\\=\sqrt {(3)^2+(1)^2}
\\=\sqrt {9+1}
\\=\sqrt {10} \text{ units}$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 1 - Graphs - 1.1 The Distance and Midpoint Formulas - 1.1 Assess Your Understanding - Page 7: 22
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