The equation of a line can be found for which situations?

the slope is known
two points on the line are known.
a point on the line and another point in the coordinate plane are known.
a point on the line and the slope are known.
three points in the coordinate plane are known.

this is really been a challenging concept for me to wrap my head around

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.