What is 7.2 times 4.2 rounded to the correct number of significant digits?

Use the four functions below for this question. compare and contrast these four functions using complete sentences focus on the slope and y- intercept first, and then on any additional properties of each function

The equation of line e is y  =  -4/9x  +  5/6.  line f is parallelto line e.  what is the slope of line f

Geometry triangles(ignore the handwriting)