My TI 84 Plus Caluclator

Hello,
The function Intersect from the CALCULATE menu finf the coordinates of a point at which two or more curves intersect.
To use it:
1. Draw the functions.

2. Press [2nd][CALC][5:Intersect]



The cursor is on one of the curves. Read the equation top of the screen. If it is one of the curves you want press [ENTER]. The cursor jumps to another curve (in this case the only other curMy TI 84 Plus Caluclator - f75e725.jpgimg src="/uploads/images/f75e725.jpg" alt="f75e725.jpg" class="h_mi" />
Read the equation on top of the screen to verify thst it is the correct one. Press [ENTER]. The calculator asks asks for a guess of the coordinMy TI 84 Plus Caluclator - ee9cd29.jpg intersection point.


As the intersection point is to the left of the current cursor position, use My TI 84 Plus Caluclator - d22f78b.jpgrow to move cursor closer to the point.


Press [ENTER], and wait for the solution. Here it is.


In your question you talk about y intercept. If you want to calculate the ordinate My TI 84 Plus Caluclator - 0a11a73.jpgt where a curve intersects the Y-axis, it is more efficient to use the [2nd][CAL][1:Value] selection.

You enter X=0 and press [ENTER]. The cursor jumps on the first curve (Y1=) an gives you the y-intercept.

Notice the position of cursor on graph. The y-value at the bottom is its ordinate.
To get the y-intercept of the second curve, My TI 84 Plus Caluclator - b14da69.jpgursor on y axis and press the DownArrow. Cursor jumps to tthe second curve.
Since the X=0 is still stored, the value of y is displayed directly.



Hope it helps.