Is tossed four times and comes up heads all four times, the probability of heads on the fifth trial is?

Given the graph below state whether or not the relation is a function, and give the domain and range.

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)

The value, v, of kalani’s stock investments over a time period, x, can be determined using the equation v=750(0.80)^-x. what is the rate of increase or decrease associated with this account? 20% decrease 20% increase 25% decrease 25% increase