write the equation passes trough (2,13) and (4,4)

⚑ Flag

y = mx + b   right?  So find the slope first.... m = (4-13)/(4-2) = -9/2 Now plug in the slope... y = (-9/2)x + b Now plug in one of the points... 13 = (-9/2)(2) + b Solve for b.... 13 = -9 + b b = 22 Now put m and b back into the slope intercept form.... y = (-9/2) x + 22 I usually then test the 2nd point to check... (4,4) in this case and it does check!!!