Question

Someone please answer this emergency pleaseee

Answer 1

7). y = 140

8). x = 9

Explanation:

Question (7).

All-right pencil factory will produce the graphite pencils, table formed will represent a linear graph.

Three points on the graph are (12, 42) and (18, 63), (40, y)

Slope of the line passing through these points =
`(y_2-y_1)/(x_2-x_1)`

m =
`(63-42)/(18-12)` =
`(y-42)/(40-12)`

`(21)/(6)` =
`(y-42)/(40-12)`

3.5 =
`(y-42)/(40-12)`

98 = y - 42

y = 140

Question (8),

If a bicyclist rides at a constant rate, table formed will represent a linear graph.

Slope of a line passing through three points (2, 25), (5, 62.5) and (x, 112.5) given in the table,

m =
`(y_2-y_1)/(x_2-x_1)`

`(62.5-25)/(5-2)=(112.5-62.5)/(x-5)`

`(37.5)/(3)=(50)/(x-5)`

37.5x - 187.5 = 150

37.5x = 337.5

x = 9