If line r and line s are parallel and ∠2 measures 45°, what is the measure of ∠3?
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If you go from point (-1, -3) to point (4, 4), you can find the slope of the line using the slope formula. 
. So our slope is 7/5. The line goes through the y axis at -3/2, so putting that together we get an equation for the line that is 
, choice D from above.