Anyone wanna talk? Im bored

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

Simone claims the initial value and y-intercept are the same thing on a graph. is she correct? if you know that a line has a slope of and a y-intercept of 7, what is the equation for that line in slope-intercept form?