Question

F the coordinates of A and B are (-10, -3) and (7, 14), respectively, the x- intercept of is

Answer 1

Hello : let  A(-10,-3)    B(7,14)
the slope is :   (YB - YA)/(XB -XA)
(14+3)/17)  = 1
an equation is : y=ax+b     a is a slope

y = x +b

 

the line  F   through point  B(7,14) :  14 =7+b
b = 7
the equation is : y =X+7

the x- intercept of F  when y=0   : x+7 =0    so : x = - 7