what is the slope of (-6,9),(7,-9)

Answer 1

(-6,9), (7,-9)

slope= (9+9)/(-6-7)= 18/-13= -18/13= -1 5/13

= -1.384615384615384615...(the sequence 384615 repeats forever)

slope= "rise over run"= difference in y coordinates divided by difference in x coordinares

=(9- -9)/(-6-7)or (-9-9)/(7- -6)= 18/-13 or -18/13

plot the 2 points& the line through them, and visually see the slope is down (negative "rise") and relatively close to -1, a downhill 45 degree diagonal incline. its slope = exactly tan^-1(-18/13)= about -54 degrees

but answer you likely want is -18/13

y=mx +b is the line's equation in slope intercept form with slope=m=-18/13

y=-18x/13 + b where b= y intercept= 9/13

y-9=(-18/13)(x+6)

y=-18x/13 -108/13+117/13

y=-18x/13+9/13