What rule would you allow to test weather (x, y) is on line l

Step-by-step explanation:

If a point (x, y) lies on a straight line, coordinates of the point will satisfy the equation.

Slope of a line passing through two points C(4, 5) and D(8, 10),

m =

m =

m =

Equation of the line passing through C(4, 5) and slope m =

y - y' = m(x - x')

y - 5 =

y =

y =

If point B(4, 0) lies on the line CD,

0 =

0 = 5

Which is not true.

Therefore, point B doesn't lie on line CD.

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5

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step-by-step explanation: