The temperature in a city increased from -12 degrees at dawn to 7 degrees in the afternoon. What was the change in temperature in degrees?

Count from -12 to 0 and then to 7. Your answer is 19 degrees.

We have thata = (-3, -1) and b = (4, 4)step 1find the slope m between  point a and point bm=(y2-y1)/(x2-> (4+1)/(4+> m1=5/7step 2find the equation of a line that form a  right angle at point bpoint  b = (4, 4)    m2=? if form a right > m1*m2=-> m2=-1/> -7/5m2=-7/5theny-y1=m*(x-> y-4=(-7/5)*(x-> y=(-7/5)*x+(28/5)+4y=-1.4x+9.6the answer is  y=-1.4x+9.6see the attached figure