Graph the equation y=2x+3. using the graph, find: for which value of x the value of y is equal to 1; 4; 0; −1

It is a linear function. We need only two points to plot the graph.

Choice any two values of x. Put them to the equation and calculate the values of y.

y = 2x + 3

for x = 2 → y = 2(2) + 3 = 4 + 3 = 7 → (2, 7)

for x = -2 → y= 2(-2) + 3 = -4 + 3 = -1 → (-2, -1)

Look at the picture.

an

y = 6x -3y -12

y +3y +12 = 6x

=> . x = { 2y / 3 +2 } this is equation of line in terms of x

=> . if line meets the x-axis the co-ordinates of meeting point would be ( x , 0 )

=> . x = 2 ( 0 ) / 3 + 2

=> . x = 2

so, the point is ( 2 , 0 )

the answer is:

mean: 6

mad: 2.14