If S is directly proportional to t squared and s= 8 when t= 4 find the value of s when t= 3

Suppose a least-squares regression line is given by modifyingabove y with caret equals 4.302 x minus 3.293. what is the mean value of the response variable if xequals20?

What are the soultion(s) to the quadratic equation 40- x^2=0

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.