book Maths Puzzle Numerical Ability

I have a problem that has (1,5) and (2,7) i have to figure out what the equation is for the slope-intercept form.

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book Other Question

Xa (insert operator here) Xb which operator cannot be true?

operator options: < > =
Jim rode his bike to school at an average rate of 8mp. On his return trip home, he averaged 6mph. If the total trip took 7 hours, how far is it from home to school