x-intercepts = where the graph hits the y axis first we find the equation of the line in 2 parts: the slope and the y intercept:
the slope: y2-y1/x2-x1
26-8/10-1= 18/9 = 2 is the slope now the y intercept: y=mx + b
take either coordinates and plug it in with m being the slope
8=2(1) + b
8=2 + b subtract 2 on both sides
6=b
y = mx + b
y=2x + 6 is the line the x intercept means where the x hitsy axis at the coordinates (x,0) so we substitute 0 for y and solve for x
0 = 2x + 6 subtract 6 from both sides
-6= 2x divide both sides by 2
-3 =x
the x intercept is : (-3,0)