Question

A student writes the equation for a line that has a slope of -6 and passes through the point (2, –8).

y -(-8) = -6(x - 2)

y -(-8) = -6x + 12

y -(-8) + 8 = -6x + 12 + 8

y = -6x + 20

Explain why the work is not correct.

Answer 1

Answer:

because -(-8)=+8 (as -×-=+)

so -(-8) + 8 = 16

Answer 2

Step-by-step explanation:

In 3rd line of LHS, he added +8 instead of -8.

-(-8) result 8 and to cancel it he had to add -8 & nof +8.

From that line, it is

y -(-8) - 8= -6x+12 -8

y+8 -8 = -6x +4

y=-6x+4