What is the equation of a line that passes through the points (-0.72, 1.42) and (4.22, 5.83)? And just because I can picture :)

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Which of the following describes the graph of y--4x-36 compared to the parent square root function? stretched by a factor of 2, reflected over the x-axis, and translated 9 units right stretched by a factor of 2, reflected over the x-axis, and translated 9 units left stretched by a factor of 2, reflected over the y-axis, and translated 9 units right stretched by a factor of 2, reflected over the y-axis, and translated 9 units left save and exit next submit

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?