Question

A line goes through the point (6,–2) and has a slope of –3.

What is the value of a if the point (a,7) lies on the line?

Answer 1

a=3

Explanation:

Answer 2

a is gonna be 3

Explanation:

Y = mx + b

slope (m) = - 3

(6,-2) ... x = 6 and y = - 2

sub and find b, the y int

-2 = - 3 (6) + b

-2 = - 18 + b

-2 + 18 = b

16 = b

so ur equation for this line is : y = - 3x + b

(a,7) ... so y = 7 ... " a " is gonna be x

y = - 3x + b

7 = - 3x + 16

7 - 16 = - 3x

- 9 = - 3x

-9/-3 = x