Which expression is equivalent 5(h+9) ? 45 h 14h 5h+9 5h+45

The tiles below are pieces of a normal ecg tracing representing a little less than two heartbeats at a resting rate of 80 bpm. arrange the tiles in their correct order. rank from first to last. do not overlap any tiles.

Which equation matches the graph shown ?

Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)