Question

У=-0,5х+5 принадлежить ли точка М(-4;7) графику этой функции

Answer 1

Нужно доказать что если x=-4 y=7.

Просто ставим x=-4 =>

y=-0.5*(-4)+5=2+5=7

Из этого следует что точка М(-4;7) принадлежит этой функции.

Answer 2

To check if the point M(-4, 7) lies on the graph of the function У = -0.5х + 5, we need to substitute the coordinates of the point (-4, 7) into the equation and see if it holds true.

Let's do that:

У = -0.5х + 5

Substitute x = -4:

У = -0.5 * (-4) + 5 У = 2 + 5 У = 7

After substituting x = -4 into the equation, we get У = 7.

Now, compare the calculated value of У (which is 7) with the y-coordinate of the point M, which is also 7. Since both values are the same, it means that the point M(-4, 7) does indeed lie on the graph of the function У = -0.5х + 5.