Question

which of the following represents the equation of the line with an x- intercept of 6 that passes through the point (4,4)?

Answer 1

`y=-2x+12`

Explanation:

To write the equation of a line, find the slope between two points. Substitute two points into the slope formula. If the equation has an x-intercept of 6 then the line passes through the point (6,0). Use (6,0) and (4,4) in the formula.

`m = (y_2-y_1)/(x_2-x_1) =(4-0)/(4-6) =(4)/(-2) =-2`

Since m = -2, substitute its value and the point (6,0) into the point slope form. Then simplify.

`y-y_1 = m(x-x_1)\\y-0 = -2 (x-6)\\y=-2x+12`