Give the slope of the line that contains (-1,-3) and (-1,-1).

slope = rise / run = (-3 - -1) / (-1 - -1) = 2/0

The slope is infinite The graph is a vertical line.

what's the question here?

m∠abd = m∠dbc

step-by-step explanation:

given : ab bisects ∠dbc

as we know that bisection means ab divides   ∠dbc   in two equal angles named as   ∠dba and   ∠abc

so, m∠abd = m∠dbc  

because ab bisects ∠dbc.

hence , the first statement m∠abd = m∠dbc is true.