Question

A point with an abscissa of 3 belongs to the line which is the graph of the equation 21x–5y=100. Find the ordinate of that point.

Answer 1

The ordinate will be -7.4.

Answer 2

-7.4

Explanation:

Put the abscissa value into the equation and solve for the ordinate.

21·3 -5y = 100

-5y = 37 . . . . . subtract 63

y = -7.4 . . . . . . divide by -5