I need help please help

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

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?

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.