Make sure she understands what 'intercept' means. MANY people have less trouble with math than with the specialized lingo of math.

y = mx + b

y - mx = b

y - intercept = b

That last jump can easily confuse people. Why is 'mx' the same as 'intercept'?

After almost 50 years I still can't keep 'ordinate' and 'abscissa' straight.

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If they can get you asking the wrong questions, they don't have to worry about the answers.