The equation y = 15x + 10 gives your score on a math quiz, where x is the number of questions you answered correctly.

The given equation is,

→ y = 15 x + 10, where y = total score on math quiz, and x = number of question answered

As this is the equation in two variables representing straight line.

As x> 0, ∴ number of questions attempted is always positive

So, as y, marks obtained will be also positive number.

By, taking positive integral values of x and y we can plot it's graph.

for example, if number of questions answered=2,4,6

then marks obtained=40, 70, 100