The regression equation y=0.5x+1.3 approximates the number of hours it takes to arrange a dinner event, y, given the number of people attending, x. Which statement is true

Answer: c) For every extra person attending an event, the time it takes to make arrangements increases by 0.5 hour

y is the time

x is nº of people

When x=1 (one person is attending the dinner):

y = 0,5 x 1 + 1.3

y = 1.8 hours

When x=2 (two peple are attending the dinner):

y = 0,5 x 2 + 1.3

y = 2,3 hours

When x=3 (three people are attending the dinner):

y = 0,5 x 3 + 1.3

y = 2,8 hours

the difference between 1.8 and 2.3 h is exactly 0,5 h.

And the difference between 2.3 and 2.8 h is also 0,5 h.

If you continue to increase x, the y will increase 0,5