tentukan persamaan garis yg melalui (7, 2) dan sejajar dengan garis 2x-5y=8

-5y = -2x + 8
y = (2/5)x - 8/5
m = 2/5
Persamaan garisnya:
y - 2 = (2/5)(x - 7)
5y - 10 = 2x - 14
2x - 5y - 4 = 0

2x - 5y = 8
5y = 2x - 8
y = [tex]\frac{2x-8}{5}[/tex]
y = [tex]\frac{2}{5}x[/tex] - [tex]\frac{8}{5}[/tex]
m = [tex]\frac{2}{5}[/tex]
sejajar dg garis 2x - 5y = 8, maka [tex]m_1[/tex] = [tex]m_2[/tex] = [tex]\frac{2}{5}[/tex]
Persamaan grs dg gradien [tex]\frac{2}{5}[/tex] dan melalui titik (7, 2):
y - [tex]y_1[/tex] = m(x - [tex]x_1[/tex])
y - 2 = [tex]\frac{2}{5}[/tex](x - 7)
y - 2 = [tex]\frac{2}{5}x[/tex] - [tex]\frac{14}{5}[/tex]
y - [tex]\frac{2}{5}x[/tex] = 2 - [tex]\frac{14}{5}[/tex]
y - [tex]\frac{2}{5}x[/tex] = [tex]\frac{10}{5}[/tex] - [tex]\frac{14}{5}[/tex]
y - [tex]\frac{2}{5}x[/tex] = [tex]-\frac{4}{5}[/tex]