The point P has coordinates (3, 4) The point Q has coordinates (a, b)
A line perpendicular to PQ is given by the equation 3x + 2y = 7
Find an expression for b in terms of a

Really need on these. i have no idea what to do

The data shown in the table below represents the weight, in pounds, of a little girl, recorded each year on her birthday. age (in years) weight (in pounds) 2 32 6 47 7 51 4 40 5 43 3 38 8 60 1 23 part a: create a scatter plot to represent the data shown above. sketch the line of best fit. label at least three specific points on the graph that the line passes through. also include the correct labels on the x-axis and y-axis. part b: algebraically write the equation of the best fit line in slope-intercept form. include all of your calculations in your final answer. part c: use the equation for the line of best fit to approximate the weight of the little girl at an age of 14 years old.

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.