Idon't understand how to find slope, can someone me with the problems circled in blue? !
(show your work )

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Data for the height of a model rocket launch in the air over time are shown in the table. darryl predicted that the height of the rocket at 8 seconds would be about 93 meters. did darryl make a good prediction? yes, the data are best modeled by a quadratic function. the value of the function at 8 seconds is about 93 meters. yes, the data are best modeled by a linear function. the first differences are constant, so about 93 meters at 8 seconds is reasonable. no, the data are exponential. a better prediction is 150 meters. no, the data are best modeled by a cubic function. a better prediction is 100 meters.

Mia’s gross pay is 2953 her deductions total 724.15 what percent if her gross pay is take-home pay