Could I get some help with these questions please? I am trying to understand this concept.

4. Let III) 2 1:2 4. Find the equation, in slope-intercept form, of the line passing through the points [1.f[1)] and (3.f[3]} on the graph off. 5. Let ft} = 1'1 - III. Find the slope [just the slope, not the equation} of the line passing through the points [1. f [1)] and {1 + h. f [1 + M) on the graph of f . HINT: The answer will include the variable h_... 5. Sketch the graphs of the given functions on the some coordinate system. Plot and label all x and v intercepts. AND the pointls] where the two graphs intersect. x} =1325ondgfx}=211