Question

x-intercept=3, y-intercept=2/5. Find the slope-intercept form?

Answer 1

Since you are given two coordinates: (3,0) and (0, 2/5), you can use them to find the slope:
\[m=\frac{ \Delta y }{ \Delta x }=\frac{ \left( \frac{ 2 }{ 5 }-0 \right) }{ 0-3 }=-\frac{ 2 }{ 15 }\]

Then slope-intercept form to plug in your known variables.
\[y=-\frac{ 2 }{ 15 }x+\frac{ 2 }{ 5 }\]

If you need to know anything else, tell me.