Arrange the pairs of points in increasing order of the slopes of the lines joining them

(15,30) and (20,40)

(12,32) and (18,48)

(27,12) and (72,32)

(45,15) and (60,20)

(27,2) and (243,18)

(18,63) and (24,84)

(63,9) and (84,12)



Answer :

By using the formula of slope of a line, it can be calculated that

Slope of (e) < slope of (g) < slope of (d) < slope of (c) < slope of (b) < slope of (f) < slope of (a)

What is slope of a line?

Slope of a line is the tangent of the angle that the line makes with the positive direction of x axis.

If  [tex]\theta[/tex] is the angle that the line makes with the positive direction of x axis, then slope (m) is given by

m = [tex]tan\theta[/tex]

a) The coordinates are (15, 30) and (20, 40)

Slope = [tex]\frac{40 - 30}{20 - 15}\\[/tex]

         [tex]= \frac{10}{5}[/tex]

         = 2

b) The coordinates are (12, 32) and (18, 48)

Slope = [tex]\frac{48 - 32}{18 - 12}\\[/tex]

         [tex]= \frac{16}{6}[/tex]

         = [tex]\frac{8}{3}[/tex]

c) The coordinates are (27, 12) and (72, 32)

Slope = [tex]\frac{32 - 12}{72 - 27}\\[/tex]

         [tex]= \frac{20}{45}[/tex]

         = [tex]\frac{4}{9}[/tex]

d) The coordinates are (45, 15) and (60, 20)

Slope = [tex]\frac{20 - 15}{60 - 45}\\[/tex]

         [tex]= \frac{5}{15}[/tex]

         = [tex]\frac{1}{3}[/tex]

e) The coordinates are (27, 2) and (243, 18)

Slope = [tex]\frac{18 - 2}{243 - 27}\\[/tex]

         [tex]= \frac{16}{216}[/tex]

         = [tex]\frac{2}{27}[/tex]

f) The coordinates are (18, 63) and (24, 84)

Slope = [tex]\frac{84 - 63}{24 - 18}\\[/tex]

         [tex]= \frac{21}{6}[/tex]

         = [tex]\frac{7}{2}[/tex]

g) The coordinates are (63, 9) and (84, 12)

Slope = [tex]\frac{12- 9}{84 - 63}\\[/tex]

         [tex]= \frac{3}{21}[/tex]

         = [tex]\frac{1}{7}[/tex]

Now, the fractions in increasing order are

[tex]\frac{2}{27} < \frac{1}{7} < \frac{1}{3} < \frac{4}{9} < \frac{8}{3} < \frac{7}{2} < 2[/tex]

So

Slope of (e) < slope of (g) < slope of (d) < slope of (c) < slope of (b) < slope of (f) < slope of (a)

To learn more about slope, of a line refer to the link-

https://brainly.com/question/3493733

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