Please answer correctly

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b