Find the value of x so that the line passing through (10, 5) and (x, 9) has a slope of -2.

Question

anonymous · Answer

Well we know that to find the slope, it's (y2-y1)/(2-x1)=slope 
So if (10,5) is your first point and (x,9) is your second and you already know the slope, just plug and chug! :)

anonymous · Answer

Oops, that should be (y2-y1)/(x2-x1)

anonymous · Answer

IMPORTANT LINE RELATED EQUATIONS TO KNOW AND MEMORIZE

slope formula
m= slope/ gradiant -- same thing
$$m=\frac{y_2-y_1}{x_2-x_1}$$

standard formula
$$Ax+By=C$$

point-slope formula
$$y-y_1=m(x-x_1)$$

slope-intercept formula
b= y-intercept -- in the form of (0,y)

$$y=mx+b$$