I need help 25 points

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)

If a runner who runs at a constant speed of p miles per hour runs a mile in exactly p minutes what is the integer closest to the value p

Grandpa ernie is shrinking! over the past 4 years his height decreased by a total of 2.4 cm. it decreased by the same amount each year. what was the change in grandpa ernie's height each year